US3213061A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Norcamphanediol polyesters
Assignee: Eastman Kodak Co
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Filing: 1961-09-14
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Granted: 1965-10-19
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Expires: 1981-09-14
Abstract
No abstract record available.
Inventors
- 👤 John R Caldwell
- 👤 James E Poe
- 👤 Jr Winston J Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:36
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/199; C08G64/00; C08G64/02; C08G64/0208
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A LINEAR THERMOPLASTIC POLYESTER OF (A) AT LEAST ONE DIBASIC CARBOXYLIC ACID AND (B) AT LEAST ONE DIHYDROXY COMPOUND OF WHICH THE MAJOR MOLE PROPORTION IS SELECTED FROM THE GROUP CONSISTING OF THE 2,5-, THE 2,6- AND THE 2,7-ISOMERS OF NORCAMPHANEDIOL, WHICH POLYMER MELTS AT ABOUT ABOVE 140*C. AND BELOW ABOUT 360*C. AND IS CAPABLE OF BEING FORMED INTO FIBERS AND FILM.
Claim 2
Dependent Claim
62 words
A LINEAR THERMOPLASTIC POLYESTER OF (A) AT LEAST ONE DIBASIC CARBOXYLIC ACID AND (B) AT LEAST ONE DIHYDROXY COMPOUND OF WHICH THE MAJOR MOLE PROPORTION IS SELECTED FROM THE GROUP CONSISTING OF THE 2,5-, THE 2,6- AND THE 2,7-ISOMERS OF NORCAMPHANEDIOL, WHICH POLYMER MELTS AT ABOUT ABOVE 140*C. AND BELOW ABOUT 360*C. AND IS CAPABLE OF BEING FORMED INTO FIBERS AND FILM.
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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) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |