Patent US2819329A successfully refreshed from Google Patents.
US2819329A
Expired / Lapsed
US
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Rubber composition containing 2, 6-bis (2'-hydroxy-3'-tert butyl-5'-lower alkylbenzyl)-4-methyl phenols as stabilizers
Assignee: Wyeth Holdings LLC
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Filing: 1954-02-05
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Granted: 1958-01-07
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Expires: 1974-02-05
Abstract
No abstract record available.
Inventors
- 👤 Frank A V Sullivan
- 👤 Arnold R Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:07
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
IN A PROCESS FOR RETARDING THE NORMAL OXIDATION OF A VULCANIZED NATURAL RUBBER, THE STEPS WHICH COMPRISE ADDING TO A VULCANIZABLE NATURAL RUBBER COMPOSITION A COMPOUND REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
30 words
IN A PROCESS FOR RETARDING THE NORMAL OXIDATION OF A VULCANIZED NATURAL RUBBER, THE STEPS WHICH COMPRISE ADDING TO A VULCANIZABLE NATURAL RUBBER COMPOSITION A COMPOUND REPRESENTED BY THE FORMULA:
References Cited (Backward Citations)
US2538355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |