US2510808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasticizing isobutylene-diolefin rubber
Assignee: Standard Oil Development Co
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Filing: 1945-03-21
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Granted: 1950-06-06
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Expires: 1965-03-21
Abstract
No abstract record available.
Inventors
- 👤 Per K Frolich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:57
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/37
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
83 words
IN THE PROCESSING OF A PREDOMINANTLY LINEAR CHAIN POLYMER PREPARED FROM A MAJOR PROPORTION OF ISOBUTYLENE AND A MINOR PROPORTION OF A C4-C6 CONJUGATED DIOLEFIN HAVING A MOLECULAR WEIGHT IN THE RANGE BETWEEN 25,000 AND 200,000 AND A HIGH VISCOSITY, THE STEPS OF ADDING TO THE POLYMER 0.1 TO 1% OF A C8 TO C12 ALKYL MERCAPTAN AND MILLING THE POLYMER IN THE PRESENCE OF THE ADDED MERCAPTAN AT A TEMPERATURE BETWEEN 200* F. AND 350*F. TO REDUCE THE VISCOSITY OF THE POLYMER.
References Cited (Backward Citations)
US2098542A
Cited
GB520505A
Cited
US2234204A
Cited
US2316949A
Cited
GB542645A
Cited
US2384070A
Cited
US2415449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-05 | 1953-12-05 | 1954-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-05 | 1957-12-05 | 1958-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-05 | 1961-12-05 | 1962-06-06 | $7700.00 | Window Closed / Lapsed |