US3203933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing polyamides from aromatic amino acids
Assignee: Monsanto Co
•
Filing: 1961-10-18
•
Granted: 1965-08-31
•
Expires: 1981-10-18
Abstract
No abstract record available.
Inventors
- 👤 William A H Huffman
- 👤 Ralph W Smith
- 👤 Jr William T Dye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:18
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/12; C08G75/00; C08G75/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A PROCESS FOR THE PREPARATION OF WHOLLY AROMATIC POLYAMIDES HAVING THE RECURRING STRUCTURAL UNIT
Claim 2
Dependent Claim
14 words
A PROCESS FOR THE PREPARATION OF WHOLLY AROMATIC POLYAMIDES HAVING THE RECURRING STRUCTURAL UNIT
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |