Patent US3656873A successfully refreshed from Google Patents.
Patent US6117154A successfully refreshed from Google Patents.
Patent US2620323A successfully refreshed from Google Patents.
US2620323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Age resistor for low-unsaturation polymers
Assignee: Standard Oil Development Co
•
Filing: 1949-03-31
•
Granted: 1952-12-02
•
Expires: 1969-03-31
Abstract
No abstract record available.
Inventors
- 👤 Andrew F Sayko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:08
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/02; C08K3/06; C08K5/00; C08K5/16; C08K5/32; C08K5/33; C08L; C08L23/00; C08L23/02; C08L23/18; C08L23/20; C08L23/22
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
64 words
A COMPOSITION OF MATTER COMPRISING A CURED LOW UNSATURATION COPOLYMER OF A MAJOR PROPORTION OF AN ISOOLEFIN AND A MINOR PROPORTION OF A DIOLEFIN CONTAINING 5 PARTS OF POLYISOBUTYLENE HAVING A MOLECULAR WEIGHT NUMBER OF 100,000 PER HUNDRED PARTS OF COPOLYMERS, SAID COPOLYMER HAVING A STAUDINGER MOLECULAR WEIGHT NUMBER BETWEEN 45,000 AND 60,000 AND BEING CURED WITH PARAQUINONE DIOXIME, SULFUR AND AN OXIDIZING AGENT.
References Cited (Backward Citations)
US2392847A
Cited
US2445283A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |