US2651667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber stabilized with a thiourea derivative
Assignee: Ethyl Corp
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Filing: 1951-08-15
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Granted: 1953-09-08
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Expires: 1971-08-15
Abstract
No abstract record available.
Inventors
- 👤 Eugene F Hill
- 👤 Pree David O De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:35
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/39; C08K5/405; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
25 words
A COMPOSITION CONSISTING ESSENTIALLY OF RUBBER AND, AS A PRINCIPAL ANTIOXIDANT MATERIAL IN QUANTITY SUFFICIENT TO PREVENT SAID DETERIORATION BY OXYGEN, AND N,N''-BIS(P-AMINOPHENYL) THIOUREA ANTIOXIDANT.
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) | 1956-09-07 | 1957-03-09 | 1957-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-07 | 1961-03-09 | 1961-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-07 | 1965-03-09 | 1965-09-08 | $7700.00 | Window Closed / Lapsed |