US2989495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solution of wholly aromatic polyamides in liquid organic amine solvents
Assignee: EIDP Inc
•
Filing: 1958-08-13
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Granted: 1961-06-20
•
Expires: 1978-08-13
Abstract
No abstract record available.
Inventors
- 👤 Hare Weston Andrew
- 👤 White Helen Lyng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:25
CPC Classifications
C; C08; C08L; C08L77/00; C08L77/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A SOLUTION OF A WHOLLY AROMATIC POLYAMIDE CHARACTERIZED BY THE RECURRING STRUCTURE UNIT
Claim 2
Dependent Claim
13 words
A SOLUTION OF A WHOLLY AROMATIC POLYAMIDE CHARACTERIZED BY THE RECURRING STRUCTURE UNIT
References Cited (Backward Citations)
US2831834A
Cited
US2756221A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |