Patent US2838461A successfully refreshed from Google Patents.
Patent US2805213A successfully refreshed from Google Patents.
US2805213A
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Interpolyesters prepared from mixtures of p, p'-sulfonyl dibenzoic acid and cyclic aliphatic dicarboxylic acids
Assignee: Eastman Kodak Co
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Filing: 1954-04-09
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Granted: 1957-09-03
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Expires: 1974-04-09
Abstract
No abstract record available.
Inventors
- 👤 John R Caldwell
- 👤 John W Wellman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:03
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/688; C08G63/6884; C08G63/6886
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A LINEAR INTERPOLYESTER HAVING A SOFTENING TEMPERATURE RANGE OF FROM ABOUT 5* TO 20* C. CONTAINING IN THE INTERPOLYESTER CONFIGURATION A RATIO OF ABOUT 10 OF THE FOLLOWING REPEATING UNITS:
Claim 2
Dependent Claim
30 words
A LINEAR INTERPOLYESTER HAVING A SOFTENING TEMPERATURE RANGE OF FROM ABOUT 5* TO 20* C. CONTAINING IN THE INTERPOLYESTER CONFIGURATION A RATIO OF ABOUT 10 OF THE FOLLOWING REPEATING UNITS:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |