US4222955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3,5-Diamino-4-tert.-alkylbenzonitriles
Assignee: Goodyear Tire and Rubber Co
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Filing: 1979-08-31
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Granted: 1980-09-16
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Expires: 1999-08-31
Abstract
Abstract The invention relates to substituted aromatic diamines and polyurethanes cured thereby. The diamines are individually selected from 3,5-diamino-4-tert-alkylbenzoates, 3,5-diamino-4-tert-alkylbenzonitriles and alkylene bis(3-amino-4-tert-alkylbenzoate).
Inventors
- 👤 Daniel A. Chung
- 👤 John P. Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:00
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
20 words
A 3,5-diamino-4-tert.-alkylbenzonitrile of the formula ##STR6## wherein R 1 is selected from tertiary saturated hydrocarbon radicals containing 4-6 carbon atoms.
Claim 2
Dependent Claim
20 words
A 3,5-diamino-4-tert.-alkylbenzonitrile of the formula ##STR6## wherein R 1 is selected from tertiary saturated hydrocarbon radicals containing 4-6 carbon atoms.
Claim 3
Dependent Claim
19 words
The 3,5-diamino-4-tert.-alkylbenzonitrile of claim 1 where R 1 is selected from tertiary butyl, tertiary amyl and tertiary hexyl radicals.
Claim 4
Dependent Claim
15 words
The 3,5-diamino-4-tert.-alkylbenzonitrile of claim 1 selected from the group consisting of 3,5-diamino-4-tert-butylbenzonitrile, 3,5-diamino-4-tert-amylbenzonitrile and 3,5-diamino-4-tert-hexylbenzonitrile.
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) | 1983-09-16 | 1984-03-17 | 1984-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-16 | 1988-03-17 | 1988-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-16 | 1992-03-17 | 1992-09-16 | $7700.00 | Window Closed / Lapsed |