US3036004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating composition containing a sulfurized hydrocarbon viscosity index improver
Assignee: Individual
•
Filing: 1958-01-13
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Granted: 1962-05-22
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Expires: 1978-01-13
Abstract
No abstract record available.
Inventors
- 👤 Franklin I L Lawrence
- 👤 Michael J Pohorilla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:11
CPC Classifications
C; C10; C10M; C10M135/00; C10M135/02; C10M135/04; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/34; C10M2221/00; C10M2221/04; C10M2221/041; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2223/06; C10M2223/065; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/08; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
A COMPOSITION USEFUL FOR IMPROVING THE VISCOSITY INDEX OF LUBRICATING OILS, GREASES, TRANSMISSION FLUIDS AND THE LIKE, CONSISTING ESSENTIALLY OF A PETROLEUM HYDROCARBON RESIN WHICH IS SUBSTANTIALLY FREE FROM WAX AN ASPHALT AND WHICH IS PRODUCED BY FRACTIONATION OF HEAVY PETROLEUM FRACTIONS WITH A LIQUEFIED NORMALLY GASEOUS HYDROCARBON, SAID RESIN HAVING AN SUS VISCOSITY AT 210*F. OF AT LEAST 900, AN EBULLIOSCOPIC MOLECULAR WEIGHT OF AT LEAST 1000, AND A BROMINE NUMBER OF ABOUT 1 TO ABOUT 10, CONDENSED BY HEATING SAID RESIN WITH AT LEAST ABOUT 5% BY WEIGHT OF ELEMENTAL SULFUR AT A TEMPERATURE OF ABOUT 400*F. TO ABOUT 600*F. FOR A PERIOD OF TIME SUFFICIENT TO INCREASE THE SUS VISCOSITY AT 210*F. BY AT LEAST ABOUT 250 GREATER THAN THAT OF THE ORIGINAL RESIN, THE THUS SULFUR CONDENSED COMPOSITION HAVING THE PROPERTY OF INCREASING THE VISCOSITY INDEX OF A 60 AT 100 SUS STANDARD BASE OIL BY AT LEAST TEN VISCOSITY INDEX UNITS MORE THAN A LIKE AMOUNT OF THE ORIGINAL RESIN, WHEN ADDED IN THE PROPORTIONS OF 10% TO SAID BASE OIL.
Claim 2
Dependent Claim
176 words
A COMPOSITION USEFUL FOR IMPROVING THE VISCOSITY INDEX OF LUBRICATING OILS, GREASES, TRANSMISSION FLUIDS AND THE LIKE, CONSISTING ESSENTIALLY OF A PETROLEUM HYDROCARBON RESIN WHICH IS SUBSTANTIALLY FREE FROM WAX AN ASPHALT AND WHICH IS PRODUCED BY FRACTIONATION OF HEAVY PETROLEUM FRACTIONS WITH A LIQUEFIED NORMALLY GASEOUS HYDROCARBON, SAID RESIN HAVING AN SUS VISCOSITY AT 210*F. OF AT LEAST 900, AN EBULLIOSCOPIC MOLECULAR WEIGHT OF AT LEAST 1000, AND A BROMINE NUMBER OF ABOUT 1 TO ABOUT 10, CONDENSED BY HEATING SAID RESIN WITH AT LEAST ABOUT 5% BY WEIGHT OF ELEMENTAL SULFUR AT A TEMPERATURE OF ABOUT 400*F. TO ABOUT 600*F. FOR A PERIOD OF TIME SUFFICIENT TO INCREASE THE SUS VISCOSITY AT 210*F. BY AT LEAST ABOUT 250 GREATER THAN THAT OF THE ORIGINAL RESIN, THE THUS SULFUR CONDENSED COMPOSITION HAVING THE PROPERTY OF INCREASING THE VISCOSITY INDEX OF A 60 AT 100 SUS STANDARD BASE OIL BY AT LEAST TEN VISCOSITY INDEX UNITS MORE THAN A LIKE AMOUNT OF THE ORIGINAL RESIN, WHEN ADDED IN THE PROPORTIONS OF 10% TO SAID BASE OIL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-21 | 1965-11-20 | 1966-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-21 | 1969-11-20 | 1970-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-21 | 1973-11-20 | 1974-05-22 | $7700.00 | Window Closed / Lapsed |