US4254272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic diamines and polyurethanes cured thereby
Assignee: Goodyear Tire and Rubber Co
•
Filing: 1979-02-21
•
Granted: 1981-03-03
•
Expires: 1999-02-21
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
2026-11-06 11:07
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
A substituted aromatic diamine selected from cyclohexyl-3,5-diamino-4-tert-butylbenzoate and phenyl-3,5-diamino-4-tert-butylbenzoate.
Claim 2
Dependent Claim
9 words
A substituted aromatic diamine selected from cyclohexyl-3,5-diamino-4-tert-butylbenzoate and phenyl-3,5-diamino-4-tert-butylbenzoate.
References Cited (Backward Citations)
GB1220310A
Cited
US3736350A
Cited
US3681290A
Cited
DE2160589A1
Cited
US3991023A
Cited
DE2167037A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-02 | 1984-09-01 | 1985-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-02 | 1988-09-01 | 1989-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-02 | 1992-09-01 | 1993-03-03 | $7700.00 | Window Closed / Lapsed |