US2721877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil additives and a process for their preparation
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1951-08-22
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Granted: 1955-10-25
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Expires: 1971-08-22
Abstract
No abstract record available.
Inventors
- 👤 Alexander H Popkin
- 👤 James F Black
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:06
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C08; C08F; C08F222/00; C08F222/10; C08F222/12; C08F222/14; C08F222/145; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/086; C10M2213/00; C10M2213/04; C10M2213/06; C10M2217/00; C10M2217/02; C10M2217/026; C10N; C10N2040/00; C10N2040/08; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
IN A PROCESS FOR THE FORMATION OF LUBRICATING OIL ADDITIVE MATERIALS WHICH COMPRISES COPOLYMERIZING (1) ABOUT 98 TO 60% BY WEIGHT OF A SUBSTANTIALLY NEUTRAL ESTER PREPARED BY ESTERIFYING (A) A MATERIAL OF THE CLASS CONSISTING OF ALPHA, BETA-UNSATURATED POLYCARBOXYLIC ACIDS AND THEIR ANHYDRIDES WITH (B) SUBSTANTIALLY SATURATED PRIMARY ALIPHATIC ALCOHOL CONTAINING IN THE RANGE OF 8 TO 18 CARBON ATOMS PER MOLECULE WITH (2) ABOUT 2 TO 40% BY WEIGHT OF A LOW MOLECULAR WEIGHT VINYL ESTER IN THE PRESENCE OF A PEROXIDE CATALYST, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT SAID ESTERIFICATION IN THE PRESENCE OF A STOICHIOMETRIC EXCESS OF FROM 2.5% TO 15% BY WEIGHT OF SAID ALCOHOL AND COPOLYMERIZING SAID NEUTRAL ESTER WITH SAID VINYL ESTER IN THE PRESENCE OF SAID EXCESS OF ALCOHOL.
Claim 2
Dependent Claim
127 words
IN A PROCESS FOR THE FORMATION OF LUBRICATING OIL ADDITIVE MATERIALS WHICH COMPRISES COPOLYMERIZING (1) ABOUT 98 TO 60% BY WEIGHT OF A SUBSTANTIALLY NEUTRAL ESTER PREPARED BY ESTERIFYING (A) A MATERIAL OF THE CLASS CONSISTING OF ALPHA, BETA-UNSATURATED POLYCARBOXYLIC ACIDS AND THEIR ANHYDRIDES WITH (B) SUBSTANTIALLY SATURATED PRIMARY ALIPHATIC ALCOHOL CONTAINING IN THE RANGE OF 8 TO 18 CARBON ATOMS PER MOLECULE WITH (2) ABOUT 2 TO 40% BY WEIGHT OF A LOW MOLECULAR WEIGHT VINYL ESTER IN THE PRESENCE OF A PEROXIDE CATALYST, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT SAID ESTERIFICATION IN THE PRESENCE OF A STOICHIOMETRIC EXCESS OF FROM 2.5% TO 15% BY WEIGHT OF SAID ALCOHOL AND COPOLYMERIZING SAID NEUTRAL ESTER WITH SAID VINYL ESTER IN THE PRESENCE OF SAID EXCESS OF ALCOHOL.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-24 | 1959-04-25 | 1959-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-24 | 1963-04-25 | 1963-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-24 | 1967-04-25 | 1967-10-25 | $7700.00 | Window Closed / Lapsed |