US3799954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Urethanes for the treatment of rubber
Assignee: NATURAL RUBBER PRODUCERS
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Filing: 1972-09-07
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Granted: 1974-03-26
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Expires: 1992-09-07
Abstract
Abstract NOVEL URETHANES HAVING THE FORMULA C$NH.CO.O.N=Q=Z)M WHERE X IS AN ORGANIC GROUP OF FUNCITONALITY M, Q IS AN AROMATIC GROUP IN THE QUINONOID CONFIGURATION, X IS AN IMINO GROUPS, AND M IS AN INTEGER EQUAL TO 1 OR MORE, MAY BE MADE BY REACTING AN ORGANIC ISOCYANATE WITH A NITROSOANILINE. THE COMPOUNDS ARE USEFUL IN THE TREATMENT OF RUBBER.
Inventors
- 👤 M Cain
- 👤 G Knight
- 👤 K Gazeley
- 👤 P Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:28
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08G18/807; C08G18/28; C08G18/67; C08G18/69; C08K; C08K5/00; C08K5/16; C08K5/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |