§
Luxuse
Patent Intelligence
Sign In
← Back to Patent Explorer
US5593567A Expired / Lapsed US ⏱️ 0.0 years remaining

Gasoline fuel

Assignee: Individual
•
Filing: 1995-03-22
•
Granted: 1997-01-14
•
Expires: 2015-03-22
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract By controlling one or more properties of a gasoline fuel suitable for combustion in automobiles, the emissions of NOx, CO and/or hydrocarbons can be reduced. The preferred fuel for reducing all three such emissions has a Reid Vapor Pressure no greater than 7.5 psi (0.51 atm), essentially zero olefins, and a 50% D-86 Distillation Point greater than about 180° F. (82° C.) but less than 205° F. (96.1° C.)

Inventors

  • 👤 Peter J. Jessup
  • 👤 Michael C. Croudace

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 23:21
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/04; C10L1/06

Claims Analysis

Total Claims: 42
Claim 1
Independent Claim 163 words
A method for operating an automotive vehicle having a spark-induced, internal combustion engine and a catalytic converter to yield a reduced amount of NOx, CO, or unburned hydrocarbons as compared to combusting fuel A/O AVE in said engine, the method comprising: (1) introducing into the engine an unleaded gasoline, suitable for combustion in an automotive engine, having the following properties: (a) a Reid Vapor Pressure less than 7.5 psi; (b) a 10% D-86 distillation point no greater than 158° F.; (c) a 50% D-86 distillation point less than 203° F.; (d) a 90% D-86 distillation point less than 300° F.; (e) a paraffin content greater than 65 volume percent; (f) an olefin content less than 8 volume percent; and (g) an octane value of at least 87; and thereafter (2) combusting the unleaded gasoline in said engine; (3) introducing at least some of the resultant engine exhaust emissions into the catalytic converter; and (4) discharging emissions from the catalytic converter to the atmosphere.
Claim 2
Independent Claim 163 words
A method for operating an automotive vehicle having a spark-induced, internal combustion engine and a catalytic converter to yield a reduced amount of NOx, CO, or unburned hydrocarbons as compared to combusting fuel A/O AVE in said engine, the method comprising: (1) introducing into the engine an unleaded gasoline, suitable for combustion in an automotive engine, having the following properties: (a) a Reid Vapor Pressure less than 7.5 psi; (b) a 10% D-86 distillation point no greater than 158° F.; (c) a 50% D-86 distillation point less than 203° F.; (d) a 90% D-86 distillation point less than 300° F.; (e) a paraffin content greater than 65 volume percent; (f) an olefin content less than 8 volume percent; and (g) an octane value of at least 87; and thereafter (2) combusting the unleaded gasoline in said engine; (3) introducing at least some of the resultant engine exhaust emissions into the catalytic converter; and (4) discharging emissions from the catalytic converter to the atmosphere.
Claim 3
Dependent Claim 21 words
A method as defined in claim 1 wherein the unleaded gasoline has a 50% D-86 distillation point less than 200° F.
Claim 4
Dependent Claim 20 words
A method as defined in claim 1 wherein the unleaded gasoline has a 50% distillation point less than 198° F.
Claim 5
Dependent Claim 21 words
A method as defined in claim 1 wherein the unleaded gasoline has a 50% D-86 distillation point less than 195° F.
Claim 6
Dependent Claim 21 words
A method as defined in claim 1 wherein the unleaded gasoline has a 50% D-86 distillation point less than 193° F.
Claim 7
Independent Claim 174 words
A method for operating an automotive vehicle having a spark-induced, internal combustion engine and a catalytic converter to yield a reduced amount of NOx, CO, or unburned hydrocarbons as compared to combusting fuel A/O AVE in said engine, the method comprising: (1) introducing into the engine an unleaded gasoline, suitable for combustion in an automotive engine, having the following properties: (a) a Reid Vapor Pressure less than 7.5 psi; (b) a 10% D-86 distillation point no greater than 158° F.; (c) a 50% D-86 distillation point less than 208° F.; (d) a 90% D-86 distillation point no greater than 315° F.; (e) a paraffin content greater than 72 volume percent; (f) an olefin content less than 8 volume percent; (g) an aromatics content of at least 4.5 volume percent; and (h) an octane value of at least 87; and thereafter (2) combusting the unleaded gasoline in said engine; (3) introducing at least some of the resultant engine exhaust emissions into the catalytic converter; and (4) discharging emissions from the catalytic converter to the atmosphere.
Claim 8
Independent Claim 174 words
A method for operating an automotive vehicle having a spark-induced, internal combustion engine and a catalytic converter to yield a reduced amount of NOx, CO, or unburned hydrocarbons as compared to combusting fuel A/O AVE in said engine, the method comprising: (1) introducing into the engine an unleaded gasoline, suitable for combustion in an automotive engine, having the following properties: (a) a Reid Vapor Pressure less than 7.5 psi; (b) a 10% D-86 distillation point no greater than 158° F.; (c) a 50% D-86 distillation point less than 208° F.; (d) a 90% D-86 distillation point no greater than 315° F.; (e) a paraffin content greater than 72 volume percent; (f) an olefin content less than 8 volume percent; (g) an aromatics content of at least 4.5 volume percent; and (h) an octane value of at least 87; and thereafter (2) combusting the unleaded gasoline in said engine; (3) introducing at least some of the resultant engine exhaust emissions into the catalytic converter; and (4) discharging emissions from the catalytic converter to the atmosphere.
Claim 9
Dependent Claim 22 words
A method as defined in claim 6 wherein the unleaded gasoline has a 50% D-86 distillation point no greater than 205° F.
Claim 10
Dependent Claim 21 words
A method as defined in claim 6 wherein the unleaded gasoline has a 50% D-86 distillation point less than 200° F.
Claim 11
Dependent Claim 21 words
A method as defined in claim 6 wherein the unleaded gasoline has a 50% D-86 distillation point less than 198° F.
Claim 12
Dependent Claim 21 words
A method as defined in claim 6 wherein the unleaded gasoline has a 50% D-86 distillation point less than 195° F.
Claim 13
Dependent Claim 21 words
A method as defined in claim 6 wherein the unleaded gasoline has a 50% D-86 distillation point less than 193° F.
Claim 14
Dependent Claim 25 words
A method as defined in claim 7, 8, 9, or 11 wherein the unleaded gasoline has a 10% D-86 distillation point less than 140° F.
Claim 15
Dependent Claim 34 words
A method as defined in claim 1, 2, 3, 4, or 5 wherein the unleaded gasoline has an olefin content less than 6 volume percent and a paraffin content greater than 68 volume percent.
Claim 16
Dependent Claim 20 words
A method as defined in claim 13 wherein the unleaded gasoline has a Reid Vapor Pressure less than 7.0 psi.
Claim 17
Dependent Claim 21 words
A method as defined in claim 14 wherein the unleaded gasoline has a 10% D-86 distillation point less than 140° F.
Claim 18
Dependent Claim 43 words
A method as defined in claim 1, 2, 3, 4, or 5 wherein the unleaded gasoline has an olefin content less than 6 volume percent, a paraffin content greater than 70 volume percent and a 10% D-86 distillation point less than 140° F.
Claim 19
Dependent Claim 20 words
A method as defined in claim 16 wherein the unleaded gasoline has a Reid Vapor Pressure less than 7.0 psi.
Claim 20
Dependent Claim 30 words
A method as defined in claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, or 11 wherein the unleaded gasoline has an octane value of at least 92.
Claim 21
Dependent Claim 22 words
A method as defined in claim 1, 2, 3, 4, 5, or 11 wherein the unleaded gasoline contains one or more oxygenates.
Claim 22
Dependent Claim 19 words
A method as defined in claim 19 wherein the unleaded gasoline has an octane value of at least 92.
Claim 23
Dependent Claim 20 words
A method as defined in claim 19 wherein the unleaded gasoline has an olefin content less than 6 volume percent.
Claim 24
Dependent Claim 19 words
A method as defined in claim 21 wherein the unleaded gasoline has an octane value of at least 92.
Claim 25
Dependent Claim 30 words
A method as defined in claim 21 wherein the unleaded gasoline has a Reid Vapor pressure less than 7.0 psi. and a 10% D-86 distillation point less than 140° F.
Claim 26
Dependent Claim 19 words
A method as defined in claim 23 wherein the unleaded gasoline contains an octane value of at least 92.
Claim 27
Dependent Claim 40 words
A method as defined in claim 6, 8, 9, or 11 wherein the unleaded gasoline contains one or more oxygenates in a total oxygen concentration no greater than the equivalent provided by about 14.9 volume percent methyl tertiary butyl ether.
Claim 28
Dependent Claim 19 words
A method as defined in claim 25 wherein the unleaded gasoline has an octane value of at least 92.
Claim 29
Dependent Claim 30 words
A method as defined in claim 25 wherein the unleaded gasoline has a 90% D-86 distillation point less than 300° F. and an olefin content less than 6 volume percent.
Claim 30
Dependent Claim 19 words
A method as defined in claim 27 wherein the unleaded gasoline has an octane value of at least 92.
Claim 31
Dependent Claim 20 words
A method as defined in claim 27 wherein the unleaded gasoline has a Reid Vapor pressure less than 7.0 psi.
Claim 32
Dependent Claim 21 words
A method as defined in claim 29 wherein the unleaded gasoline has a 10% D-86 distillation point less than 140° F.
Claim 33
Dependent Claim 19 words
A method as defined in claim 30 wherein the unleaded gasoline has an octane value of at least 92.
Claim 34
Dependent Claim 20 words
A method as defined in claim 31 wherein the unleaded gasoline has a paraffin content greater than 75 volume percent.
Claim 35
Dependent Claim 31 words
A method as defined in claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, or 11 wherein the unleaded gasoline has a Reid Vapor Pressure less than 7.0 psi.
Claim 36
Dependent Claim 25 words
A method as defined in claim 6, 7, 8, 9, or 11 wherein the unleaded gasoline has an olefin content less than 6 volume percent.
Claim 37
Dependent Claim 20 words
A method as defined in claim 34 wherein the unleaded gasoline has a Reid vapor Pressure less than 7.0 psi.
Claim 38
Dependent Claim 21 words
A method as defined in claim 34 wherein the unleaded gasoline has a 10% D-86 distillation point less than 140° F.
Claim 39
Dependent Claim 21 words
A method as defined in claim 34 wherein the unleaded gasoline has a 90% D-86 distillation point less than 300° F.
Claim 40
Dependent Claim 38 words
A method as defined in claim 37 wherein the unleaded gasoline has a paraffin content greater than 75 volume percent, a 10% D-86 distillation point less than 140° F., and a Reid Vapor Pressure less than 7.0 psi.
Claim 41
Dependent Claim 19 words
A method as defined in claim 38 wherein the unleaded gasoline has an octane value of at least 92.
Claim 42
Dependent Claim 19 words
A method as defined in claim 34 wherein the unleaded gasoline has an octane value of at least 92.

References Cited (Backward Citations)

USRE20596E Cited
US1409404A Cited
US2032330A Cited
US2142937A Cited
US2204215A Cited
US2190480A Cited
US2209904A Cited
US2407716A Cited
US2401983A Cited
US2409157A Cited
US2407717A Cited
US2411582A Cited
US2495648A Cited
US2593561A Cited
US2944003A Cited
US2857254A Cited
US2968609A Cited
US2939836A Cited
AU213136B2 Cited
US3034878A Cited
US3009791A Cited
US3002917A Cited
US3009789A Cited
US3156640A Cited
US3385680A Cited
US3391077A Cited
US3753670A Cited
US3873276A Cited
US3658690A Cited
US3785790A Cited
US3765848A Cited
US3685502A Cited
US3980448A Cited
US3920698A Cited
US3758401A Cited
US3988122A Cited
US3903194A Cited
US3836342A Cited
US3957901A Cited
US3886759A Cited
US3955938A Cited
US3894849A Cited
US4220120A Cited
US4194886A Cited
US4205960A Cited
US3904508A Cited
US3902870A Cited
US4022589A Cited
US4112889A Cited
US4017268A Cited
US4118425A Cited
US4045092A Cited
US4378230A Cited
US4324569A Cited
US4180036A Cited
US4211639A Cited
US4214876A Cited
US4244703A Cited
US4372752A Cited
US4347062A Cited
US4336032A Cited
US4231756A Cited
US4420930A Cited
US4215997A Cited
US5015356A Cited
US4297172A Cited
US4313738A Cited
US4322304A Cited
US4378231A Cited
US4295862A Cited
US4339245A Cited
US4341529A Cited
US4294587A Cited
US4295861A Cited
US4321063A Cited
US4321061A Cited
US4319981A Cited
US4312636A Cited
US4468233A Cited
US4417904A Cited
US4455909A Cited
US4429173A Cited
US4474580A Cited
US4387257A Cited
US4388081A Cited
US4444567A Cited
US4437436A Cited
US4525174A Cited
US4437435A Cited
US4743373A Cited
US4501596A Cited
US4508617A Cited
US4737159A Cited
US4600408A Cited
US4602919A Cited
US4647292A Cited
US5032144A Cited
US4781728A Cited
US4899014A Cited
US4607129A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 2000-01-14 2000-07-15 2001-01-14 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2004-01-14 2004-07-15 2005-01-14 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2008-01-14 2008-07-15 2009-01-14 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag