US2848439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear polyesters of bis (nu-p-carboxyphenyl) alkylene diamides and manufacture thereof
Assignee: Eastman Kodak Co
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Filing: 1955-04-26
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Granted: 1958-08-19
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Expires: 1975-04-26
Abstract
No abstract record available.
Inventors
- 👤 Delbert D Reynolds
- 👤 Thomas M Laakso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:56
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A HIGHLY POLYMERIC MATERIAL CAPABLE OF FORMING ORIENTABLE FIBERS AND FILMS, SAID MATERIAL HAVING AN INHERENT VISCOSITY OF AT LEAST 0.7 HAVING A MELTING POINT OF AT LEAST 200*C. AND CONSISTING ESSENTIALLY OF A SUCCESSION OF RECURRING STRUCTURAL UNITS OF THE FORMULA
Claim 2
Dependent Claim
42 words
A HIGHLY POLYMERIC MATERIAL CAPABLE OF FORMING ORIENTABLE FIBERS AND FILMS, SAID MATERIAL HAVING AN INHERENT VISCOSITY OF AT LEAST 0.7 HAVING A MELTING POINT OF AT LEAST 200*C. AND CONSISTING ESSENTIALLY OF A SUCCESSION OF RECURRING STRUCTURAL UNITS OF THE FORMULA
References Cited (Backward Citations)
FR889344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |