Patent US2957797A successfully refreshed from Google Patents.
US2957797A
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Preparation of reactive cellulosic material
Assignee: Asahi Kasei Corp
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Filing: 1957-02-04
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Granted: 1960-10-25
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Expires: 1977-02-04
Abstract
No abstract record available.
Inventors
- 👤 Nakayama Masatoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:37
CPC Classifications
C; C08; C08B; C08B1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A METHOD OF PRODUCING CELLULOSE MATERIAL WHOSE FIBERS ARE SEPARATED FROM EACH OTHER, WHICH CONSISTS OF FLOATING A REFINED CELLULOSIC MATERIAL WITH STIRRING IN FOAM OF A DILUTE AQUEOUS SOLUTION OF A SURFACE ACTIVE AGENT IN THE CONDITION THAT THE AMOUNT OF THE SOLUTION OF THE SURFACE ACTIVE AGENT PER AMOUNT OF CELLULOSIC MATERIAL IS FROM 16:1 TO 25:1 PARTS BY WEIGHT, THE FOAM VOLUME IS FROM 80 TO 130 LITERS TO EACH KG. OF CELLULOSIC MATERIAL, STIRRING IS ALWAYS IN A DEFINITE DIRECTION, AND THE DRIVING FORCE FOR STIRRING DEFINED BY THE FORMULA
Claim 2
Independent Claim
94 words
A METHOD OF PRODUCING CELLULOSE MATERIAL WHOSE FIBERS ARE SEPARATED FROM EACH OTHER, WHICH CONSISTS OF FLOATING A REFINED CELLULOSIC MATERIAL WITH STIRRING IN FOAM OF A DILUTE AQUEOUS SOLUTION OF A SURFACE ACTIVE AGENT IN THE CONDITION THAT THE AMOUNT OF THE SOLUTION OF THE SURFACE ACTIVE AGENT PER AMOUNT OF CELLULOSIC MATERIAL IS FROM 16:1 TO 25:1 PARTS BY WEIGHT, THE FOAM VOLUME IS FROM 80 TO 130 LITERS TO EACH KG. OF CELLULOSIC MATERIAL, STIRRING IS ALWAYS IN A DEFINITE DIRECTION, AND THE DRIVING FORCE FOR STIRRING DEFINED BY THE FORMULA
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) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |