The following nanos do not have 4 hour duration as of 18.7.4. Nanos included in the list have existing samples of the same or very similar nano line at 4 hour duration. Mostly used data from directly in-game, where ever I have guessed, I added an unverified tag. If I have missed anything or gotten anything wrong, please reply or PM me so I can update.
ADVENTURER
Armor Buffs
Minor Wilderness Protection (QL 4)
Lesser Wilderness Protection (QL 20)
Wilderness Protection (QL 43)
Major Wilderness Protection (QL 70)
Greater Wilderness Protection (QL 96)
Supreme Wilderness Protection (QL 123) - unverified
Buffs
Survival Aid (QL 33)
Robust Treatment (QL 136)
Damage Shields
Frost With Snow (QL 7)
Jacket of Blades (QL 17)
Enshroud with Barbs (QL 24)
Firefly's Fury (QL 30)
Cloak of Fire (QL 37)
Sparking Touch (QL 47)
Porcupine Barrier (QL 53)
Fiery Wrap (QL 63)
Skin of the Toad (QL 73)
Arctic Gale (QL 83)
Guard of the Grizzly (QL 90)
Nest of Vipers (QL 99)
Magma Coating (QL 109)
Protection of the Storm (QL 116)
Biting Blades (QL 126)
Corrosive Barrier (QL 132)
Fiery Vengeance (QL 136)
Razor Barrier (QL 139)
Interlocking Barbs (QL 142)
Personal Blizzard (QL 149)
Lightning's Child (QL 152)
Retaliatory Barrier (QL 159)
Wings of the Phoenix (QL 162)
Revenge of the Valkyrie (QL 165) - unverified
Retribution of the Aesir (QL 169) - unverified
Morph Auras
Lycanthropic Dexterity
Kin of the Tarasque
Squeaking from the Darkness
Claws of the Magal
Boon of the Enigma
Dragon Scales
Furry Precision
Feline Ferocity
Gift of the Twig
Lupine Agility
AGENT
Executioner Buff
Training of the Executioner (QL 53)
Guidance of the Executioner (QL 93)
Steps of the Executioner (QL 132)
Path of the Executioner (QL 149)
Form of the Executioner (QL 179)
Damage Buffs - Line A
Minor Nano Augmentation (QL 1)
Lesser Anatomy Lesson (QL 10)
Nano Augmentation (QL 24)
Anatomy Lesson (QL 40)
Major Nano Augmentation (QL 80)
Greater Anatomy Lesson (QL 106)
Agent Proc Buffs
Blast of Outflanking
Blast of Rejection
Blast of Ommitance
Blast of Circumvention
Blast of Neglect
Blast of Avoidance
Waves of Harm
Waves of Unsettling
Waves of Sickening
Waves of Illness
Waves of Numbness
Waves of Jarring
Waves of Anger
Unsettling Shock
Sickening Shock
Numbing Shock
Jarring Shock
Anger Shock
BUREAUCRAT
Buffs
Authority Figure (QL 43)
Motivational Speech
Motivational Speech: Improved Heroic Measures
Motivational Speech: Heroic Measures
Motivational Speech: Glorious Leader
Motivational Speech: Triumphant Pose
Motivational Speech: Bravery Overcomes
Motivational Speech: Lead from the Front
Motivational Speech: Assassin's Focus
Motivational Speech: Opportunity Knocks
Motivational Speech: Improvise and Adapt
Motivational Speech: Implement Through Iteration
Motivational Speech: Organizational Opportunities
Motivational Speech: Only the Paranoid Will Survive!
Pet Taunt Buff
Mud Slinger (QL 44)
Defamation 101 (QL 130)
Character Assassin (QL 173)
Pet Damage Buffs
Gallant Hero: The Enraged Drone (QL 30)
Gallant Hero: The Infuriated Minion (QL 52)
Gallant Hero: The Aggravated Servant (QL 71)
Gallant Hero: The Indignant Flunky (QL 92)
Gallant Hero: The Angry Servitor (QL 110)
Gallant Hero: The Bitter Clerk (QL 131)
Gallant Hero: The Irate Atache (QL 152)
Gallant Hero: The Incensed Retainer (QL 173)
Gallant Hero: The Vengeful Butler (QL 199)
DOCTOR
Buffs
Enhanced First Aid (QL 14)
Specialist Treatment (QL 33)
Superior First Aid (QL 119)
Strength Buffs
Enlarge (QL 37)
ENFORCER
Buffs
Thug's Delight (QL 1)
Damage Shields
Avenging Shield (QL 4)
Bristling Shield (QL 10)
Field of Sparks (QL 20)
Glowing Retribution (QL 27)
Arctic CLoak (QL 37)
Poison Stingers (QL 47)
Immolation Shield (QL 63)
Bristling Guard (QL 73)
Barbaric Blades (QL 83)
Lightning Shield (QL 106)
Toxic Barrier (QL 126)
Glacial Cloak (QL 132)
Lick of Fire (QL 136)
Screen of Blades (QL 139)
Coruscating Screen (QL 146)
Taunt Procs
Dreadbringer
Ragebringer
Hatebringer
Wrathbringer
Irebringer
Fearbringer
ENGINEER
Buffs
Crowbar Subtlety (QL 20)
Philosopher's Stone (QL 53)
Trap Artifice (QL 73)
Engineer Auras
Isochronal Sloughing Assault Shield
Isochronal Sloughing Defensive Shield
Isochronal Sloughing Protective Barrier
Isochronal Sloughing Combat Field
Improved Isochronal Sloughing Combat Field
Sympathetic Fortress Screen
Sympathetic Force Field
Sympathetic Defensive Screen
Sympathetic Protective Field
Sympathetic Shielding Barrier
Sympathetic Armor Boost
Sympathetic Entropy Infusion
Sympathetic Arms Enhancement
Sympathetic Reactive Cocoon
Sympathetic Reactive Field
Sympathetic Harmonic Cocoon
Sympathetic Harmonic Field
Sympathetic Plasma Shielding
Sympathetic Energy Cocoon
Sympathetic Retaliatory Barrier
Pet Buffs
Intrusive Aura of Slave
Intrusive Aura of the Humble Servant
Intrusive Aura of Sloth
Intrusive Aura of Malaise
Intrusive Aura of Binding
Intrusive Aura of Entanglement
Formula 22
FIXER
Fixer Suppressor Buff
Minor Suppressor (QL 1)
Lesser Suppressor (QL 14)
Suppressor (QL 33)
Major Suppressor (QL 73)
Supreme Suppressor (QL 106)
Spray With Lead (QL 136)
Shower With Lead (QL 156)
Frenzy of Shells (QL 169)
Damage Buffs - Line A
Poison Modification (QL 1)
Lesser Nano Boost (QL 10)
Contact Poison (QL 27)
Hasty Augmentation Cloud (QL 43)
Venom Modification (QL 60)
Nano Boost (QL 80)
Lifebane Modification (QL 90)
Augmentation Cloud (QL 106)
Greater Nano Boost (QL 136)
Advanced Augmentation Cloud (QL 142)
Targeted Augmentation Cloud (QL 149)
Neural Interfaced Augmentation Cloud (QL 159)
Semi-Sentient Augmentation Cloud (QL 169)
KEEPER
[u]Keeper Auras[/b]
Sentinel Ward
Guardian Ward
Benevolent Ward
Ward
Barrier of the Resolute
Barrier of the Veracious
Barrier of the Devoted
Barrier of the Staunch
Barrier of the Loyal
Imminence of Bloodshed
Imminence of Warfare
Imminence of Havoc
Imminence of Battle
Imminence of Conflict
Imminence of Scrimmage
Vengeance of the Blessed
Vengeance of the Virtuous
Vengeance of the Resolute
Vengeance of the Steadfast
Vengeance of the Loyal
Enervate Bindings
Enervate Shackles
Enervate Impediments
Enervate Constraints
Enervate Bonds
Ambient Revitalization
Ambient Amelioration
Ambient Regeneration
Ambient Rejuvenation
Ambient Rehabilitation
Ambient Alleviation
Tone of Benevolence
Tone of Rapport
Tone of Tranquility
Tone of Purity
Tone of Accord
Keeper Procs
Venerated Sanctifier
Glorious Sanctifier
Exalted Sanctifier
Honored Sanctifier
Sanctifier
Carnage Reaper
Havoc Reaper
Reaper
MARTIAL ARTIST
Buffs
Elusive Target (QL 37)
Fleet Foot (QL 83)
Strength Buff
Muscle Stim (QL 20)
META-PHYSICIST
Buffs
Symbol Helper (QL 10)
Advanced Symbol Manipulation (QL 93)
Pet Buffs
Touch of Poison
Healthy Manifestation
NANO-TECHNICIAN
Fortify
Enfraam's Trivial Fortification (QL 14)
Enfraam's Minor Fortification (QL 24)
Enfraam's Lesser Fortification (QL 37)
Enfraam's Fortification (QL 47)
Enfraam's Superior Fortification (QL 60)
Enfraam's Major Fortification (QL 80)
Enfraam's Greater Fortification (QL 93)
Enfraam's Supreme Fortification (QL 113)
Enfraam's Glorious Fortification (QL 140)
Enfraam's Augmented Fortification (QL 156)
Enfraam's Perfected Fortification (QL 166)
Izgimmer's Mockery (QL 182)
Buffs
Dark Movement (QL 90)
Improved Dark Movement
Living Codex of Izgrimmer
Enfraam's Toolkit
SHADE
Buffs
Voice of the Banshee
Touch of the Specter
Hand of the Shadow
Kick of the Phantom
Knock of the Poltergeist
Slap of the Zombie
Double Fence
Twice the Shield
Double Cover
Dual Defender
Master Piercer
Probe of Death
Piercing Gash
Piercing Tooth
Sharpen Dagger
Whetstone Effect
Shade Proc Buffs
Sacrificial Caress
Sacrificial Grasp
Sacrificial Blow
Sacrificial Touch
Ritualistic Embrace
Ritualistic Caress
Ritualistic Grasp
Ritualistic Blow
Ritualistic Touch
Quintessence of Paralyzation
Quintessence of Incapacitation
Elemental Dissipation
Intrinsic Dissipation
Primitive Dissipation
Rudimentary Dissipation
SOLDIER
Armor Buffs
Minor Combat Barrier (QL 4)
Minor Absorption Shield (QL 14)
Lesser Combat Barrier (QL 20)
Lesser Absorption Shield (QL 37)
Combat Barrier (QL 50)
Absorption Shield (QL 66)
Superior Combat Barrier (QL 83)
Superior Absorption Shield (QL 99)
Advanced Combat Barrier (QL 119)
Advanced Absorption Shield (QL 132)
Perfected Combat Barrier (QL 139)
Perfected Absorption Shield (QL 142)
Heavy Assault Combat Barrier (QL 152)
Heavy Assault Absorption Shield (QL 159)
Damage Buffs - Line A
Damage Multiplier (QL 7)
Persistent Damage Multiplier (QL 17)
Damage Amplifier (QL 40)
Persistent Damage Amplifier (QL 57)
Helepolis of the Besieger (QL 139)
Initiative Buffs
Quickshot (QL 17)
Attack Booster (QL 27)
Offensive Steamroller (QL 156)
Weapon Buffs
Rifle Mastery (QL 37)
A Seargeant's Knowledge (QL 30)
Assault Rifle Mastery (QL 50)
Laser Surgery (QL 33)
Ranged Energy Weapon Mastery (QL 63)
Improved Ranged Energy Weapon Mastery
Swiss Cheese
Crowd Disperser
Alleysweeper
Artillery Fire
Canonry Fire
Battery Fire
Total Focus (QL 136)
Improved Total Focus
Weapon Special Buffs
Metal Stream (QL 31)
Metal Rain (QL 56)
Hail of Metal (QL 80)
Metal Storm (QL 106)
Metal Strike (QL 140)
Metal Barrage (QL 170)
Soldier Clip Junkie (QL 200)
Power Volley (QL 38)
Power Burst (QL 64)
Power of Three (QL 88)
Riot Control (QL 126)
Soldier Reflect Auras
Adaptive Resonance Field
Reactive Resonance Field
Harmonizing Resonance Field
Empowered Reactive Reflective Field
Empowered Major Reflective Field
Empowered Greater Reflective Field
Empowered Reflective Field
Empowered Lesser Reflective Field
Empowered Minor Reflective Field
Empowered Partial Reflective Field
Empowered Reactive Deflection Field
Empowered Major Deflection Field
Empowered Greater Deflection Field
Empowered Deflection Field
Empowered Lesser Deflection Field
Empowered Minor Deflection Field
Empowered Partial Deflection Field
TRADER
Buffs
Apprentice: Electrical Engineering (QL 24)
Apprentice: Field Quantum Physics (QL 27)
Apprentice: Mechanical Engineering (QL 30)
Apprentice: Pharmaceuticals (QL 33)
Apprentice: Weapon Smithing (QL 33)
Journeyman: Electrical Engineering (QL 80)
Journeyman: Field Quantum Physics (QL 80)
Journeyman: Mechanical Engineer (QL 83)
Journeyman: Pharmaceutical (QL 86)
Journeyman: Weapon Smithing (QL 86)
Maestro: Electrical Engineering (QL 152)
Maestro: Field Quantum Physics (QL 152)
Maestro: Mechanical Engineering (QL 152)
Maestro: Pharmaceutical (QL 156)
Maestro: Weapon Smithing (QL 156)
Quantum Uncertainty (QL 139)
Damage Buffs - Line C
Balanced Striker (QL 7)
Fine Tuning (QL 126)
Relentless Slayer (QL 159)
Unstoppable Killer
Hired Hands (QL 30)
Riding Shotgun (QL 80)
Guard Convoy (QL 149)
GENERAL
Damage Buffs - Line A
Weapon Enhancement
Buffs Players Would Like to See Made 4 Hours
Engineer
"Software Hacking" pet buff line
Nano-technician
"NF Range Buff" line
"NP Cost Buff" line
"Nano Over Time - Line A" line
Trader
Trading Mogul
Bulk Trader
Frequent Customer
UPDATE (24 Sept): Made 4 hr in 18.8.5
Adv: Poisonous Bite
Bur: Gunslinger line
Doc: Iron Circle
Eng: Armor buff line, Damage buffs line, Damage Shield line, Trade Skill buff lines, Extreme Prejudice, Initiative buff line
Fix: Run Speed / Evasion buff line / Long HoT line
MA: Armor buff line, Damage buff line, Initiative buff line, Bow buff line, Lesser Controlled Rage, MA Mastery, Return Attack, Velocity, Limbo Mastery
Sha: Shadow in the Night, Faster than Your Shadow
If there are other nanos on this list that have been updated, please reply with the details and we'll get the list updated.