US3081348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalysts for condensation reactions of primary amines with dihydroxy aromatic compounds
Assignee: Goodyear Tire and Rubber Co
•
Filing: 1958-07-25
•
Granted: 1963-03-12
•
Expires: 1978-07-25
Abstract
No abstract record available.
Inventors
- 👤 Ronald B Spacht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:13
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/0234; B01J31/0235; B01J31/0237; B01J31/26; B01J31/28; C; C07; C07C; C07C209/00; C07C209/04; C07C209/14; C07C209/18; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/18; B01J2231/00; B01J2231/40; B01J2231/42; B01J2231/4277; B01J2231/4283; B01J23/00; B01J23/70; B01J23/74; B01J23/745
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
IN THE PROCESS OF PREPARING AROMATIC DIAMINES COMPRISING REACTING (1) FROM TWO TO THREE MOLS OF A PRIMARY AMINE HAVING THE FOLLOWING STRUCTURAL FORMULA
Claim 2
Dependent Claim
24 words
IN THE PROCESS OF PREPARING AROMATIC DIAMINES COMPRISING REACTING (1) FROM TWO TO THREE MOLS OF A PRIMARY AMINE HAVING THE FOLLOWING STRUCTURAL FORMULA
References Cited (Backward Citations)
GB314872A
Cited
US2029642A
Cited
US2133825A
Cited
US2156792A
Cited
US2225368A
Cited
US2166223A
Cited
US2238320A
Cited
US2180936A
Cited
GB611316A
Cited
GB619877A
Cited
US2503712A
Cited
US2824137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |