US3049518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamides from n, n'-bis (3-aminophenyl)-isophthalamide
Assignee: EIDP Inc
•
Filing: 1960-03-31
•
Granted: 1962-08-14
•
Expires: 1980-03-31
Abstract
No abstract record available.
Inventors
- 👤 Stephens Curtis Wayne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:58
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/32; C08G73/00; C08G73/06; C08G73/10; C08G73/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
11 words
AN ALTERNATING COPOLYMER CONSISTING ESSENTIALLY OF RECURRING UNITS OF THE FORMULA:
References Cited (Backward Citations)
US2516585A
Cited
US2708617A
Cited
US2696482A
Cited
US2766222A
Cited
FR1199460A
Cited
FR1199458A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-13 | 1966-02-12 | 1966-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-13 | 1970-02-12 | 1970-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-13 | 1974-02-12 | 1974-08-14 | $7700.00 | Window Closed / Lapsed |