Patent US2906731A successfully refreshed from Google Patents.
US2906731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Butyl rubber and phosphorothioates
Assignee: Monsanto Chemicals Ltd
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Filing: 1957-04-03
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Granted: 1959-09-29
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Expires: 1977-04-03
Abstract
No abstract record available.
Inventors
- 👤 Rutherford B Hill
- 👤 Dudley B Merrifield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:07
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/5398
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
THE PROCESS OF STABILIZING A RUBBERY COLOLYMER OF AT LEAST 85% ISOOLEFIN OF 4 TO 7 CARBON ATOMS AND A MINOR AMOUNT OF A CONJUGATED DIENE HYDROCARBON CONTAINING 4 TO 10 CARBON ATOMS WHICH COMPRISES INCORPORATING THEREIN AN EFFECTIVE CONCENTRATION WITHIN THE RANGE OF 0.01%-5% OF THE COPPLYMER OF A STABILIZER CONSISTING OF A PHOSPHOROTHIOATE REPRESENTED BY THE STRUCTURE
Claim 2
Dependent Claim
59 words
THE PROCESS OF STABILIZING A RUBBERY COLOLYMER OF AT LEAST 85% ISOOLEFIN OF 4 TO 7 CARBON ATOMS AND A MINOR AMOUNT OF A CONJUGATED DIENE HYDROCARBON CONTAINING 4 TO 10 CARBON ATOMS WHICH COMPRISES INCORPORATING THEREIN AN EFFECTIVE CONCENTRATION WITHIN THE RANGE OF 0.01%-5% OF THE COPPLYMER OF A STABILIZER CONSISTING OF A PHOSPHOROTHIOATE REPRESENTED BY THE STRUCTURE
References Cited (Backward Citations)
US2538355A
Cited
US2739123A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-28 | 1963-03-30 | 1963-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-28 | 1967-03-30 | 1967-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-28 | 1971-03-30 | 1971-09-29 | $7700.00 | Window Closed / Lapsed |