US2628212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized synthetic rubber compositions containing 2, 2-bis (2-hydroxy-3-t-butyl-5 methylphenyl)-propane
Assignee: Standard Oil Development Co
•
Filing: 1949-12-10
•
Granted: 1953-02-10
•
Expires: 1969-12-10
Abstract
No abstract record available.
Inventors
- 👤 David W Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:54
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A STABILIZED SOLID SYNTHETIC RUBBER COMPOSITION CONSISTING OF A SOLID SYNTHETIC RUBBER SELECTED FROM THE GROUP CONSISTING OF COPOLYMERS OF ISOPRENE AND ISOBUTYLENE AND A POLYISOBUTYLENE HAVING A STAUDINGER MOLECULAR WEIGHT IN THE RANGE OF 40,000 TO 200,000, ADMIXED WITH FROM 0.1 TO 5 WEIGHT PER CENT OF 2,2-BIS(2-HYDROXY-3T-BUTYL-5 METHYLPHENYL)-PROPANE AS AN INHIBITOR AGAINST OXIDATIVE DETERIORATION.
Claim 2
Dependent Claim
56 words
A STABILIZED SOLID SYNTHETIC RUBBER COMPOSITION CONSISTING OF A SOLID SYNTHETIC RUBBER SELECTED FROM THE GROUP CONSISTING OF COPOLYMERS OF ISOPRENE AND ISOBUTYLENE AND A POLYISOBUTYLENE HAVING A STAUDINGER MOLECULAR WEIGHT IN THE RANGE OF 40,000 TO 200,000, ADMIXED WITH FROM 0.1 TO 5 WEIGHT PER CENT OF 2,2-BIS(2-HYDROXY-3T-BUTYL-5 METHYLPHENYL)-PROPANE AS AN INHIBITOR AGAINST OXIDATIVE DETERIORATION.
References Cited (Backward Citations)
US1977627A
Cited
US2069573A
Cited
US2225942A
Cited
US2315957A
Cited
US2407087A
Cited
US2411579A
Cited
US2434662A
Cited
US2471887A
Cited
US2515906A
Cited
US2538355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-10 | 1956-08-11 | 1957-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-10 | 1960-08-11 | 1961-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-10 | 1964-08-11 | 1965-02-10 | $7700.00 | Window Closed / Lapsed |