US2502391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of synthetic elastomers
Assignee: ExxonMobil Oil Corp
•
Filing: 1948-03-23
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Granted: 1950-03-28
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Expires: 1968-03-23
Abstract
No abstract record available.
Inventors
- 👤 Ernst P Rittershausen
- 👤 Paul D Sharpe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:32
CPC Classifications
C; C08; C08L; C08L21/00; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L25/10; C08L9/00; C08L9/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
IN A BASIC GUM STOCK CONTAINING A BUTADIENE-STYRENE ELASTOMER, THE IMPROVEMENT WHICH COMPRISES: INCORPORATING THEREIN A SMALL AMOUNT, SUFFICIENT TO STABILIZE SAID STOCK AGAINST OXIDATION OF A POLYMERIC THIOPHENE AMINE HAVING A MOLECULAR WEIGHT BETWEEN ABOUT 850 AND ABOUT 1500.
Claim 2
Dependent Claim
40 words
IN A BASIC GUM STOCK CONTAINING A BUTADIENE-STYRENE ELASTOMER, THE IMPROVEMENT WHICH COMPRISES: INCORPORATING THEREIN A SMALL AMOUNT, SUFFICIENT TO STABILIZE SAID STOCK AGAINST OXIDATION OF A POLYMERIC THIOPHENE AMINE HAVING A MOLECULAR WEIGHT BETWEEN ABOUT 850 AND ABOUT 1500.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-27 | 1953-09-26 | 1954-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-27 | 1957-09-26 | 1958-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-27 | 1961-09-26 | 1962-03-28 | $7700.00 | Window Closed / Lapsed |