Patent US3058818A successfully refreshed from Google Patents.
US3058818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gasolines containing polymeric additive agents
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1959-04-22
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Granted: 1962-10-16
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Expires: 1979-04-22
Abstract
No abstract record available.
Inventors
- 👤 Adlai E Michaels
- 👤 Elbert D Nostrand
- 👤 Thomas S Tutwiler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:17
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/234; C10L1/236; C10L1/2368
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A GASOLINE HAVING INCORPORATED THEREIN FROM ABOUT 0.001% TO ABOUT 2.0% BY WEIGHT OF A COPOLYMER OF FROM ABOUT 1% TO ABOUT 30% BY WEIGHT OF A COPOLYMER OF PYRROLIDONE SELECTED FROM THE GROUP CONSISTING OF NVINYL PYRROLIDONE AND ALKYL SUBSTITUTED N-VINYL PYRROLIDONE WHEREIN THE ALKYL GROUPS HAVE FROM 1 TO 5 CARBON ATOMS AND FROM ABOUT 70% TO ABOUT 99% BY WEIGHT OF AN ESTER SELECTED FROM THE GROUP CONSISTING OF ALKYL ACRYLATES AND METHACRYLATES IN WHICH THE ESTERIFYING ALKYL GROUPS CONTAIN FROM 1 TO ABOUT 24 CARBON ATOMS.
Claim 2
Dependent Claim
90 words
A GASOLINE HAVING INCORPORATED THEREIN FROM ABOUT 0.001% TO ABOUT 2.0% BY WEIGHT OF A COPOLYMER OF FROM ABOUT 1% TO ABOUT 30% BY WEIGHT OF A COPOLYMER OF PYRROLIDONE SELECTED FROM THE GROUP CONSISTING OF NVINYL PYRROLIDONE AND ALKYL SUBSTITUTED N-VINYL PYRROLIDONE WHEREIN THE ALKYL GROUPS HAVE FROM 1 TO 5 CARBON ATOMS AND FROM ABOUT 70% TO ABOUT 99% BY WEIGHT OF AN ESTER SELECTED FROM THE GROUP CONSISTING OF ALKYL ACRYLATES AND METHACRYLATES IN WHICH THE ESTERIFYING ALKYL GROUPS CONTAIN FROM 1 TO ABOUT 24 CARBON ATOMS.
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) | 1965-10-15 | 1966-04-16 | 1966-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-15 | 1970-04-16 | 1970-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-15 | 1974-04-16 | 1974-10-16 | $7700.00 | Window Closed / Lapsed |