US3305584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing catalyst free aromatic diamines
Assignee: Goodyear Tire and Rubber Co
•
Filing: 1964-06-15
•
Granted: 1967-02-21
•
Expires: 1984-06-15
Abstract
No abstract record available.
Inventors
- 👤 Ronald B Spacht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:20
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/04; C07C209/14; C07C209/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
IN THE PROCESS OF PREPARING AROMATIC DIAMINES COMPRISING REACTING (1) A PRIMARY AMINE HAVING THE STRUCTURAL FORMULA
Claim 2
Dependent Claim
17 words
IN THE PROCESS OF PREPARING AROMATIC DIAMINES COMPRISING REACTING (1) A PRIMARY AMINE HAVING THE STRUCTURAL FORMULA
References Cited (Backward Citations)
US1574337A
Cited
US1921587A
Cited
US2156792A
Cited
US2156793A
Cited
US2238320A
Cited
US3081349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |