Patent US2686163A successfully refreshed from Google Patents.
US2686163A
Expired / Lapsed
US
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Reclaiming rubbers
Assignee: Bridgestone Firestone Inc
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Filing: 1952-04-02
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Granted: 1954-08-10
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Expires: 1972-04-02
Abstract
No abstract record available.
Inventors
- 👤 Jr George E P Smith
- 👤 Robert B Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:30
CPC Classifications
C; C08; C08J; C08J11/00; C08J11/04; C08J11/10; C08J11/18; C08J2321/00; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62; Y10; Y10S; Y10S152/00; Y10S152/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
49 words
A PROCESS OF RECLAIMING A VULCANIZED CONJUGATED DIENE POLYMER COMPOSITION WHICH COMPRISES HEATING SAID COMPOSITION IN THE PRESENCE OF (A) A RELATIVELY SMALL QUANTITY OF A PRIMARY ALIPHATIC AMINE CONTAINING AT LEAST EIGHT CARBON ATOMS AND (B) A RELATIVELY SMALL QUANTITY OF AN AROMATIC AMINE SULFIDE HAVING THE FORMULA:
References Cited (Backward Citations)
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Cited
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US2423032A
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US2470948A
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US2470945A
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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) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |