US2856383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear polyester compositions containing a 2,4,5-trihydroxy phenone of a fatty acid as a heat stabilizer
Assignee: Eastman Kodak Co
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Filing: 1956-09-24
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Granted: 1958-10-14
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Expires: 1976-09-24
Abstract
No abstract record available.
Inventors
- 👤 M B Knowles
- 👤 Jr Louis D Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:36
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A POLYESTER COMPOSITION COMPRISING A LINEAR POLYESTER OF A DIHYDRIC ALCOHOL WITH TWO DICARBOXYLIC ACIDS, STABILIZED AGAINST DEGRADATION BY HEAT BY A CONTENT OF FROM 0.1 TO 10 PARTS BY WEIGHT OF A 2,4,5-TRIHYDROXYPHENONE OF A FATTY ACID, HAVING THE FORMULA
Claim 2
Dependent Claim
41 words
A POLYESTER COMPOSITION COMPRISING A LINEAR POLYESTER OF A DIHYDRIC ALCOHOL WITH TWO DICARBOXYLIC ACIDS, STABILIZED AGAINST DEGRADATION BY HEAT BY A CONTENT OF FROM 0.1 TO 10 PARTS BY WEIGHT OF A 2,4,5-TRIHYDROXYPHENONE OF A FATTY ACID, HAVING THE FORMULA
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) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |