US2688596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil additives
Assignee: Standard Oil Development Co
•
Filing: 1950-05-11
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Granted: 1954-09-07
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Expires: 1970-05-11
Abstract
No abstract record available.
Inventors
- 👤 Esther M Deffley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:52
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2209/00; C10M2209/02; C10M2209/04; C10M2209/06; C10M2209/062
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A PROCESS FOR THE STABILIZATION OF POLYMERS OF VINYL ETHERS CONTAINING FROM 3 TO 12 SATURATED CARBON ATOMS WHICH COMPRISES HEATING A MATERIAL CONSISTING ESSENTIALLY OF AN OIL SOLUTION OF SIAD POLYMER TO A TEMPERATURE WITHIN A RANGE FROM 50* C. TO 100* C. FOR FROM 20 TO 60 HOURS SAID POLYMER HAVING A MOLECULAR WEIGHT WITHIN THE RANGE OF FROM 20,000 TO 35,00.
Claim 2
Dependent Claim
64 words
A PROCESS FOR THE STABILIZATION OF POLYMERS OF VINYL ETHERS CONTAINING FROM 3 TO 12 SATURATED CARBON ATOMS WHICH COMPRISES HEATING A MATERIAL CONSISTING ESSENTIALLY OF AN OIL SOLUTION OF SIAD POLYMER TO A TEMPERATURE WITHIN A RANGE FROM 50* C. TO 100* C. FOR FROM 20 TO 60 HOURS SAID POLYMER HAVING A MOLECULAR WEIGHT WITHIN THE RANGE OF FROM 20,000 TO 35,00.
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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) | 1957-09-06 | 1958-03-08 | 1958-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-06 | 1962-03-08 | 1962-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-06 | 1966-03-08 | 1966-09-07 | $7700.00 | Window Closed / Lapsed |