US2631943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of a pulverulent alkyl cellulose coated upon a pulverulent carrier
Assignee: BASF Schweiz AG
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Filing: 1948-08-13
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Granted: 1953-03-17
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Expires: 1968-08-13
Abstract
No abstract record available.
Inventors
- 👤 Matter Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:12
CPC Classifications
A; A01; A01N; A01N25/00; A01N25/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A PROCESS FOR THE MANUFACTURE OF A FINELY PULVERULENT MIXTURE OF AN ALKYL-CELLULOSE, WHICH IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF METHYL CELLULOSE AND ETHYL CELLULOSE AND WHICH IS SOLUBLE IN COLD WATER AND INSOLUBLE IN HOT WATER, AND A FINELY PULVERULENT WATER-INSOLUBLE CARRIER, WHICH COMPRISES DISSOLVING THE ALKYL-CELLULOSE IN COLD WATER, THAN THEN PRECIPITATING THE ALKYLCELLULOSE ONTO THE FINELY PULVERULENT CARRIER BY HEATING THE COLD SOLUTION AFTER THE INTRODUCTION OF THE FINELY PULVERULENT CARRIER THEREINTO, DRYING THE PRODUCT THUS OBTAINED AND GRINDING THE SAME.
Claim 2
Dependent Claim
87 words
A PROCESS FOR THE MANUFACTURE OF A FINELY PULVERULENT MIXTURE OF AN ALKYL-CELLULOSE, WHICH IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF METHYL CELLULOSE AND ETHYL CELLULOSE AND WHICH IS SOLUBLE IN COLD WATER AND INSOLUBLE IN HOT WATER, AND A FINELY PULVERULENT WATER-INSOLUBLE CARRIER, WHICH COMPRISES DISSOLVING THE ALKYL-CELLULOSE IN COLD WATER, THAN THEN PRECIPITATING THE ALKYLCELLULOSE ONTO THE FINELY PULVERULENT CARRIER BY HEATING THE COLD SOLUTION AFTER THE INTRODUCTION OF THE FINELY PULVERULENT CARRIER THEREINTO, DRYING THE PRODUCT THUS OBTAINED AND GRINDING THE SAME.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |