US3079219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for wet spinning aromatic polyamides
Assignee: EIDP Inc
•
Filing: 1960-12-06
•
Granted: 1963-02-26
•
Expires: 1980-12-06
Abstract
No abstract record available.
Inventors
- 👤 Frank W King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:28
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/58; D01F6/60; D01F6/605
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
IN THE WET SPINNING PROCESS FOR FORMING SHAPED ARTICLES FROM A SOLUTION OF LINEAR POLYAMIDE WHEREIN THE AMIDE LINKAGES DIRECTLY CONNECT WHOLLY AROMATIC GROUPS, THE IMPROVEMENT WHICH COMPRISES EXTRUDING SAID SOLUTION INTO AN AQUEOUS COAGULATING BATH CONTAINING AT LEAST ABOUT 40% OF CALCUIM THIOCYANATE.
Claim 2
Dependent Claim
44 words
IN THE WET SPINNING PROCESS FOR FORMING SHAPED ARTICLES FROM A SOLUTION OF LINEAR POLYAMIDE WHEREIN THE AMIDE LINKAGES DIRECTLY CONNECT WHOLLY AROMATIC GROUPS, THE IMPROVEMENT WHICH COMPRISES EXTRUDING SAID SOLUTION INTO AN AQUEOUS COAGULATING BATH CONTAINING AT LEAST ABOUT 40% OF CALCUIM THIOCYANATE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |