Patent US2835648A successfully refreshed from Google Patents.
US2835648A
Expired / Lapsed
US
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Linear polyester compositions containing a gentisic acid derivative as a heat stabilizer
Assignee: Eastman Kodak Co
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Filing: 1956-09-21
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Granted: 1958-05-20
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Expires: 1976-09-21
Abstract
No abstract record available.
Inventors
- 👤 Gerald R Lappin
- 👤 Jr Louis D Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:01
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/20; C08K5/22; C08K5/24; C08K5/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A LINEAR POLYESTER COMPOSITION COMPRISING A LINEAR POLYESTER STABILIZED AGAINST DEGRADATION BY HEAT BY A CONTENT OF FROM 0.1 TO 10 PARTS BY WEIGHT OF A GENTISTIC ACID DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF GENTISHYDRAZIDE AND GENTISANILIDE PER 100 PARTS BY WEIGHT OF
Claim 2
Dependent Claim
44 words
A LINEAR POLYESTER COMPOSITION COMPRISING A LINEAR POLYESTER STABILIZED AGAINST DEGRADATION BY HEAT BY A CONTENT OF FROM 0.1 TO 10 PARTS BY WEIGHT OF A GENTISTIC ACID DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF GENTISHYDRAZIDE AND GENTISANILIDE PER 100 PARTS BY WEIGHT OF
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |