US3143527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamides from alkyl piperazines
Assignee: EIDP Inc
•
Filing: 1959-03-27
•
Granted: 1964-08-04
•
Expires: 1979-03-27
Abstract
No abstract record available.
Inventors
- 👤 Wittbecker Emerson La Verne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:03
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; Y; Y10; Y10S; Y10S8/00; Y10S8/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A NOVEL FIBER-FORMING POLYAMIDE CAPABLE OF ORIENTATION ALONG THE FIBER AXIS AND CONSISTING OF REPEATING STRUCTURAL UNITS SELECTED FROM THE CLASS CONSISTING OF
Claim 2
Dependent Claim
23 words
A NOVEL FIBER-FORMING POLYAMIDE CAPABLE OF ORIENTATION ALONG THE FIBER AXIS AND CONSISTING OF REPEATING STRUCTURAL UNITS SELECTED FROM THE CLASS CONSISTING OF
References Cited (Backward Citations)
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US2130948A
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US2625536A
Cited
US2831834A
Cited
BE529414A
Cited
US2813775A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |