Patent US2962473A successfully refreshed from Google Patents.
US2962473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for stabilizing halogenated butyl rubber against gelation with magnesium oxide, and stabilized product obtained thereby
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1957-03-05
•
Granted: 1960-11-29
•
Expires: 1977-03-05
Abstract
No abstract record available.
Inventors
- 👤 Francis P Baldwin
- 👤 Thomas H Hakala
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:41
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
IN A PROCESS FOR PREPARING A COPOLYMER OF 85 TO 99.5% OF C4 TO C8 ISOOLEFIN WITH 15 TO 0.5% OF A C4 TO C14 MULTIOLEFIN CONTAINING AT LEAST ABOUT 0.5 WEIGHT PERCENT OF COMBINED HALOGEN IN ITS STRUCTURE WHICH HAS BEEN RECOVERED FROM A WATER SLURRY, THE IMPROVEMENT WHICH COMPRISES BLENDING SAID COPOLYMER WITH 0.01 TO 10 WEIGHT PERCENT OF MAGNESIUM OXIDE AT A TEMPERATURE BETWEEN 0 AND 200*C. PRIOR TO RECOVERY FROM SAID SLURRY TO PRIVIDE A COPOLYMER THEREFROM STABILIZED AGAINST GELATION.
Claim 2
Dependent Claim
84 words
IN A PROCESS FOR PREPARING A COPOLYMER OF 85 TO 99.5% OF C4 TO C8 ISOOLEFIN WITH 15 TO 0.5% OF A C4 TO C14 MULTIOLEFIN CONTAINING AT LEAST ABOUT 0.5 WEIGHT PERCENT OF COMBINED HALOGEN IN ITS STRUCTURE WHICH HAS BEEN RECOVERED FROM A WATER SLURRY, THE IMPROVEMENT WHICH COMPRISES BLENDING SAID COPOLYMER WITH 0.01 TO 10 WEIGHT PERCENT OF MAGNESIUM OXIDE AT A TEMPERATURE BETWEEN 0 AND 200*C. PRIOR TO RECOVERY FROM SAID SLURRY TO PRIVIDE A COPOLYMER THEREFROM STABILIZED AGAINST GELATION.
References Cited (Backward Citations)
US2411840A
Cited
US2402020A
Cited
US2541550A
Cited
US2631984A
Cited
US2732354A
Cited
US2857357A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-29 | 1964-05-30 | 1964-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-29 | 1968-05-30 | 1968-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-29 | 1972-05-30 | 1972-11-29 | $7700.00 | Window Closed / Lapsed |