US2835603A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble thermoplastic cellulose ether compositions
Assignee: Dow Chemical Co
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Filing: 1953-11-25
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Granted: 1958-05-20
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Expires: 1973-11-25
Abstract
No abstract record available.
Inventors
- 👤 Richard W Swinehart
- 👤 Miles A Weaver
- 👤 Albert B Savage
- 👤 Bernhard V Moeller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:53
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/48; A61K9/4816; C; C08; C08K; C08K5/00; C08K5/04; C08K5/05; C08K5/053
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A THERMOPLASTIC COMPOSITION CONSISTING ESSENTIALLY OF (A) FROM 2 TO 90 PERCENT BY WEIGHT OF A WATER-SOLUBLE ALKYL HYDROXYALKYL CELLULOSE IN WHICH THE HYDROXY-ALKYL GROUP CONTAINS FROM 2 TO 3 CARBON ATOMS AND THE ALKYL GROUP CONTAINS FROM 1 TO 3 CARBON ATOMS AND IN WHICH THE O-H/C-H RATIO IS FROM 0.88 TO 1.05 AND THE MELTING POINT IS AT LEAST 10 CENTIGRADE DEGREES BELOW THE DECOMPOSITION TEMPERATURE, AND (B) CORRESPONDINGLY FROM 98 TO 10 PERCENT OF PROPYLENE GLYCOL.
Claim 2
Dependent Claim
79 words
A THERMOPLASTIC COMPOSITION CONSISTING ESSENTIALLY OF (A) FROM 2 TO 90 PERCENT BY WEIGHT OF A WATER-SOLUBLE ALKYL HYDROXYALKYL CELLULOSE IN WHICH THE HYDROXY-ALKYL GROUP CONTAINS FROM 2 TO 3 CARBON ATOMS AND THE ALKYL GROUP CONTAINS FROM 1 TO 3 CARBON ATOMS AND IN WHICH THE O-H/C-H RATIO IS FROM 0.88 TO 1.05 AND THE MELTING POINT IS AT LEAST 10 CENTIGRADE DEGREES BELOW THE DECOMPOSITION TEMPERATURE, AND (B) CORRESPONDINGLY FROM 98 TO 10 PERCENT OF PROPYLENE GLYCOL.
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) | 1961-05-19 | 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 |