US2605249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixture of antioxidants for synthetic rubber
Assignee: Bridgestone Firestone Inc
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Filing: 1949-12-30
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Granted: 1952-07-29
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Expires: 1969-12-30
Abstract
No abstract record available.
Inventors
- 👤 Harry E Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:06
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/375; C08K5/45; C08K5/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
RUBBER-LIKE COPOLYMER OF BUTADIENE AND STYRENE STABILIZED WITH A RELATIVELY SMALL AMOUNT OF A MIXTURE OF THIODIARYLAMINE AND A PHENOL SULFIDE WHICH CONTAINS NO MORE THAN FOUR PHENOL GROUPS, WHICH MIXTURE CONTAINS (A) 0.1 TO 5.0 PER CENT OF A THIODIARYLAMINE AND (B) 0.1 TO 9.9 PER CENT OF THE PHENOL SULFIDE ON THE WEIGHT OF THE COPOLYMER.
Claim 2
Dependent Claim
58 words
RUBBER-LIKE COPOLYMER OF BUTADIENE AND STYRENE STABILIZED WITH A RELATIVELY SMALL AMOUNT OF A MIXTURE OF THIODIARYLAMINE AND A PHENOL SULFIDE WHICH CONTAINS NO MORE THAN FOUR PHENOL GROUPS, WHICH MIXTURE CONTAINS (A) 0.1 TO 5.0 PER CENT OF A THIODIARYLAMINE AND (B) 0.1 TO 9.9 PER CENT OF THE PHENOL SULFIDE ON THE WEIGHT OF THE COPOLYMER.
References Cited (Backward Citations)
US1950438A
Cited
US2310449A
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 |