US2839419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble thermoplastic cellulose ether compositions
Assignee: Dow Chemical Co
•
Filing: 1956-07-11
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Granted: 1958-06-17
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Expires: 1976-07-11
Abstract
No abstract record available.
Inventors
- 👤 Francis E Windover
- 👤 Arthur W Anderson
- 👤 Jr George K Greminger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:50
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A THERMOPLASTIC COMPOSITION CONSISTING ESSENTIALLY OF (A) FROM 2 TO 90 PERCENT BY WEIGHT OF A WATER-SOLUBLE, THERMOPLASTIC HYDROXYALKYL ALKYL CELLULOSE ETHER IN WHICH THE HYDROXYALKYL GROUP CONTAINS FROM 2 TO 3 CARBON ATOMS AND 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 (B) CORRESPONDINGLY FROM 98 TO 10 PERCENT OF A PLASTICIZER SELECTED FROM THE GROUP CONSISTING OF GLYCEROL MONI-2-HYDROXYALKYL ETHER, GLYCEROL BIS (2-HYDROXYALKYL) ETHER, AND GLYCEROL TRIS (2-HYDROXYALKYL) ETHER WHEREIN EACH 2-HYDROXYALKYL GROUP CONTAINS FROM 2 TO 3 CARBON ATOMS.
Claim 2
Dependent Claim
102 words
A THERMOPLASTIC COMPOSITION CONSISTING ESSENTIALLY OF (A) FROM 2 TO 90 PERCENT BY WEIGHT OF A WATER-SOLUBLE, THERMOPLASTIC HYDROXYALKYL ALKYL CELLULOSE ETHER IN WHICH THE HYDROXYALKYL GROUP CONTAINS FROM 2 TO 3 CARBON ATOMS AND 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 (B) CORRESPONDINGLY FROM 98 TO 10 PERCENT OF A PLASTICIZER SELECTED FROM THE GROUP CONSISTING OF GLYCEROL MONI-2-HYDROXYALKYL ETHER, GLYCEROL BIS (2-HYDROXYALKYL) ETHER, AND GLYCEROL TRIS (2-HYDROXYALKYL) ETHER WHEREIN EACH 2-HYDROXYALKYL GROUP CONTAINS FROM 2 TO 3 CARBON ATOMS.
References Cited (Backward Citations)
US1877856A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |