US2684356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic rubber and preparation thereof
Assignee: Standard Oil Development Co
•
Filing: 1950-07-03
•
Granted: 1954-07-20
•
Expires: 1970-07-03
Abstract
No abstract record available.
Inventors
- 👤 Arundale Erving
- 👤 Fred W Banes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:41
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A SYNTHETIC RUBBER COPOLYMER OF ABOUT 55-85% BY WEIGHT OF BUTADIENE AND 15-45% BY WEIGHT OF ACRYLONITRILE, AND ALSO HAVING COPOLYMERIZED WHEREWITH .05 TO 1.0% BY WEIGHT OF DIVINYLBENZENE, SAID COPOLYMER BEING ADAPTED, UPON CURING, TO HAVE LESS CALENDER SHRINKAGE AND GREATER TENSILE STRENGTH THAN A COPOLYMER SIMILAR EXCEPT WITHOUT THE CROSS-LINKING AGENT.
Claim 2
Dependent Claim
53 words
A SYNTHETIC RUBBER COPOLYMER OF ABOUT 55-85% BY WEIGHT OF BUTADIENE AND 15-45% BY WEIGHT OF ACRYLONITRILE, AND ALSO HAVING COPOLYMERIZED WHEREWITH .05 TO 1.0% BY WEIGHT OF DIVINYLBENZENE, SAID COPOLYMER BEING ADAPTED, UPON CURING, TO HAVE LESS CALENDER SHRINKAGE AND GREATER TENSILE STRENGTH THAN A COPOLYMER SIMILAR EXCEPT WITHOUT THE CROSS-LINKING AGENT.
References Cited (Backward Citations)
US2281613A
Cited
US2474807A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-19 | 1958-01-18 | 1958-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-19 | 1962-01-18 | 1962-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-19 | 1966-01-18 | 1966-07-20 | $7700.00 | Window Closed / Lapsed |