Patent US2626385A successfully refreshed from Google Patents.
Patent US2604412A successfully refreshed from Google Patents.
US2604412A
Expired / Lapsed
US
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Process for the production of a cellulose ether molding powder
Assignee: Celanese Corp
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Filing: 1947-12-12
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Granted: 1952-07-22
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Expires: 1967-12-12
Abstract
No abstract record available.
Inventors
- 👤 Bonard Claude
- 👤 Rooney James Henry
- 👤 Shaw Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:24
CPC Classifications
C; C08; C08L; C08L1/00; C08L1/08; C08L1/26; C08L1/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
PROCESS FOR THE PRODUCTION OF A MOULDING POWDER FROM A WATER-INSOLUBLE ETHANOL-SOLUBLE CELLULOSE ETHER, WHICH COMPRISES FORMING A FILTERABLE SOLUTION OF THE CELLULOSE ETHER AT A TEMPERATURE ABOVE 70* C. IN A HOMOGENEOUS LIQUID MIXTURE COMPRISING A NORMALLY LIQUID SOLVENT PLASTICISER FOR THE CELLULOSE ETHER, WATER AND ETHANOL, THE RATIO OF TOTAL LIQUID TO CELLULOSE ETHER BEING BETWEEN 120:100 AND 200:100 AND THE RATIO OF PLASTICISER TO CELLULOSE ETHER BEING BETWEEN 15:100 AND 75:100, CONVERTING THE WHOLE BODY OF THE SOLUTION INTO A HOMGENEOUS POWDER CONTAINING CELLULOSE ETHER, PLASTICISER, WATER AND ETHANOL, BY ALLOWING THE SOLUTION TO COOL WHILE STIRRING, COLLECTING THE RESULTING POWDER AND EVAPORATING THE ETHANOL AND WATER THEREFROM.
Claim 2
Dependent Claim
111 words
PROCESS FOR THE PRODUCTION OF A MOULDING POWDER FROM A WATER-INSOLUBLE ETHANOL-SOLUBLE CELLULOSE ETHER, WHICH COMPRISES FORMING A FILTERABLE SOLUTION OF THE CELLULOSE ETHER AT A TEMPERATURE ABOVE 70* C. IN A HOMOGENEOUS LIQUID MIXTURE COMPRISING A NORMALLY LIQUID SOLVENT PLASTICISER FOR THE CELLULOSE ETHER, WATER AND ETHANOL, THE RATIO OF TOTAL LIQUID TO CELLULOSE ETHER BEING BETWEEN 120:100 AND 200:100 AND THE RATIO OF PLASTICISER TO CELLULOSE ETHER BEING BETWEEN 15:100 AND 75:100, CONVERTING THE WHOLE BODY OF THE SOLUTION INTO A HOMGENEOUS POWDER CONTAINING CELLULOSE ETHER, PLASTICISER, WATER AND ETHANOL, BY ALLOWING THE SOLUTION TO COOL WHILE STIRRING, COLLECTING THE RESULTING POWDER AND EVAPORATING THE ETHANOL AND WATER THEREFROM.
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) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |