Patent US7734632B2 successfully refreshed from Google Patents.
US3328352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorine containing aromatic polycarbonamides
Assignee: EIDP Inc
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Filing: 1963-06-17
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Granted: 1967-06-27
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Expires: 1983-06-17
Abstract
No abstract record available.
Inventors
- 👤 Kwolek Stephanie Louise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:24
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A LINEAR, FIBER-FORMING, SYNTHETIC POLYCARBONAMIDE WHEREIN RECURRING CARBONAMIDE LINKAGES ARE AN INTEGRAL PART OF THE POLYMER CHAIN FROM THE CLASS CONSISTING OF A HOMOPOLYMER AND A COPOLYMER, THE SAID HOMOPOLYMER AND COPOLYMER CONSISTING ESSENTIALLY OF RECURRING UNITS OF THE CLASS CONSISTING OF
Claim 2
Dependent Claim
42 words
A LINEAR, FIBER-FORMING, SYNTHETIC POLYCARBONAMIDE WHEREIN RECURRING CARBONAMIDE LINKAGES ARE AN INTEGRAL PART OF THE POLYMER CHAIN FROM THE CLASS CONSISTING OF A HOMOPOLYMER AND A COPOLYMER, THE SAID HOMOPOLYMER AND COPOLYMER CONSISTING ESSENTIALLY OF RECURRING UNITS OF THE CLASS CONSISTING OF
References Cited (Backward Citations)
US2570180A
Cited
GB632997A
Cited
US3094511A
Cited
US3081281A
Cited
US3062787A
Cited
US3194794A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |