US2958607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble thermoplastic cellulose ether compositions and films prepared therefrom
Assignee: Dow Chemical Co
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Filing: 1958-01-23
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Granted: 1960-11-01
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Expires: 1978-01-23
Abstract
No abstract record available.
Inventors
- 👤 Francis E Windover
- 👤 Jr Samuel M Rodgers
- 👤 Garth H Beaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:14
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/101; C08K5/103
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A THERMOPLASTIC COMPOSITION CONSISTING ESSENTIALLY OF FROM 50-95 PERCENT BY WEIGHT OF A WATER SOLUBLE, THERMOPLASTIC HYDROXYALKYL ALKYL CELLULOSE ETHER IN WHICH THE HYDROXYALKYL GROUP CONTAINS FORM 2 TO 4 CARBON ATOMS, THE ALKYL GROUP CONTAINS FROM 1 TO 3 CARBON ATOMS, AND WHICH HAS A MELTING POINT WHICH IS AT LEAST 10 DEGREES CENTIGRADE BELOW THE DECOMPOSITION TEMPERATURE AND CORRESPONDINGLY FROM ABOUT 50 TO 5 PERCENT BY WEIGHT OF A PLASTICIZEER, WHEREIN SAID COMPOSITION CONTAINS ESSENTIALLY AS SAID PLASTICIZER FROM AT LEAST 5 TO NOT OVER 40 PERCENT BY WEIGHT OF A GLYCEROL ACETATE SELECTED FROM THE CLASS CONSISTING OF THE MONO-, DI-, AND TRI-ACETATES OF GLYCEROL.
Claim 2
Dependent Claim
108 words
A THERMOPLASTIC COMPOSITION CONSISTING ESSENTIALLY OF FROM 50-95 PERCENT BY WEIGHT OF A WATER SOLUBLE, THERMOPLASTIC HYDROXYALKYL ALKYL CELLULOSE ETHER IN WHICH THE HYDROXYALKYL GROUP CONTAINS FORM 2 TO 4 CARBON ATOMS, THE ALKYL GROUP CONTAINS FROM 1 TO 3 CARBON ATOMS, AND WHICH HAS A MELTING POINT WHICH IS AT LEAST 10 DEGREES CENTIGRADE BELOW THE DECOMPOSITION TEMPERATURE AND CORRESPONDINGLY FROM ABOUT 50 TO 5 PERCENT BY WEIGHT OF A PLASTICIZEER, WHEREIN SAID COMPOSITION CONTAINS ESSENTIALLY AS SAID PLASTICIZER FROM AT LEAST 5 TO NOT OVER 40 PERCENT BY WEIGHT OF A GLYCEROL ACETATE SELECTED FROM THE CLASS CONSISTING OF THE MONO-, DI-, AND TRI-ACETATES OF GLYCEROL.
References Cited (Backward Citations)
US2771377A
Cited
US2839419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |