Patent US2605250A successfully refreshed from Google Patents.
US2605250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber anticracking chemicals
Assignee: Uniroyal Inc
•
Filing: 1949-01-18
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Granted: 1952-07-29
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Expires: 1969-01-18
Abstract
No abstract record available.
Inventors
- 👤 Byron A Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:58
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A RUBBER COMPOSITION IN WHICH THE RUBBER IS FROM THE CLASS CONSISTING OF NATURAL RUBBER, BUTADIENE-STYRENE COPOLYMER RUBBER AND BUTADIENE-ACRYLONITRILE COPOLYMER RUBBER, CONTAINING A MONO-OXALIC ACID SALT OF N,N''-DI-DI-SECONDARY BUTYL-P-PHENYLENE DIAMINE.
Claim 2
Dependent Claim
31 words
A RUBBER COMPOSITION IN WHICH THE RUBBER IS FROM THE CLASS CONSISTING OF NATURAL RUBBER, BUTADIENE-STYRENE COPOLYMER RUBBER AND BUTADIENE-ACRYLONITRILE COPOLYMER RUBBER, CONTAINING A MONO-OXALIC ACID SALT OF N,N''-DI-DI-SECONDARY BUTYL-P-PHENYLENE DIAMINE.
References Cited (Backward Citations)
US1875903A
Cited
US2273262A
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US2279385A
Cited
US2394003A
Cited
US2413656A
Cited
US2519755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |