US2540596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chloroprene polymer vulcanizates and method for preparing same
Assignee: Standard Oil Development Co
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Filing: 1945-11-08
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Granted: 1951-02-06
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Expires: 1965-11-08
Abstract
No abstract record available.
Inventors
- 👤 Jr John Rehner
- 👤 Paul J Flory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:30
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/32
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
54 words
THE PROCESS OF CURING POLYCHLOROPRENE COMPRISING MIXING THEREWITH IN THE PROPORTION OF 0.1% TO 10% OF THE POLYCHLOROPRENE A DINITROSO AROMATIC HYDROCARBON FROM THE GROUP CONSISTING OF META AND PARA DINITROSO SUBSTITUTED AROMATIC HYDROCARBONS, AND HEATING THE RESULTING MIXTURE TO A TEMPERATURE WITHIN THE RANGE OF 150 TO 350* F. FOR A VULCANIZING TIME.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |