Patent US3587589A successfully refreshed from Google Patents.
US3899480A
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Shaped polysaccharide articles and a method for producing them
Assignee: Takeda Pharmaceutical Co Ltd
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Filing: 1971-12-29
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Granted: 1975-08-12
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Expires: 1991-12-29
Abstract
Abstract The present invention relates to the production of shaped polysaccharide articles by the treatment of specific thermally gelable polysaccharides with specific solubilizing agents and subsequent removal of said solubilizing agents by diffusion or neutralization to effect gelation in a predetermined form.
Inventors
- 👤 Hiroshi Kimura
- 👤 Kensuke Kusakabe
- 👤 Katsuhiko Tokuda
- 👤 Masaru Miyawaki
- 👤 Hiromi Nakatani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:51
CPC Classifications
C; C12; C12P; C12P19/00; C12P19/04; A; A23; A23J; A23J3/00; A23J3/22; A23J3/225; A23J3/227; A23L; A23L17/00; A23L17/30; A23L17/35; A23L29/00; A23L29/20; A23L29/269; A23L29/271; C08; C08L; C08L5/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
110 words
A GELLED POLYSACCHARIDE SELECTED FROM THE GROUP CONSISTING OF A GELLED PS-A, PS-B AND CURDLAN WHICH IS PRODUCED BY A PROCESS COMPRISING: WHILE MAINTAINING A TEMPERATURE NOT HIGHER THAN 60*C THROUGHOUT THE PROCESS, DISSOLVING 1 TO 10% (WEIGHT/VOLUME) OF A PS-A, PS-B OR CURDLAN POLYSACCHARIDE WHICH IS THERMALLY GELAABLE IN A CONCENTRATION OF NOT LOWER THAN 1% (WEIGHT/VOLUME) AND MAINLY CONSISTS OF N- U,3- GLUCOSE UNITS, IN A SOLUTION CONTAINING 0.05 TO 5% (WEIGHT/VOLUME) OF A SOLUBILIZING AGENT SELECTED FROM THE GROUP CONSISTING OF SODIUM HYDROXIDE, POTASSIUM HYDROXIDE AND BARIUM HYDROXIDE, THEN DECREASING THE AMOUNT OF SAID SOLUBILIZING REAGENT IN THE SOLUTION BY DIFFUSION, THEREBY ALLOWING THE POLYSACCHARIDE TO GEL.
Claim 2
Dependent Claim
110 words
A GELLED POLYSACCHARIDE SELECTED FROM THE GROUP CONSISTING OF A GELLED PS-A, PS-B AND CURDLAN WHICH IS PRODUCED BY A PROCESS COMPRISING: WHILE MAINTAINING A TEMPERATURE NOT HIGHER THAN 60*C THROUGHOUT THE PROCESS, DISSOLVING 1 TO 10% (WEIGHT/VOLUME) OF A PS-A, PS-B OR CURDLAN POLYSACCHARIDE WHICH IS THERMALLY GELAABLE IN A CONCENTRATION OF NOT LOWER THAN 1% (WEIGHT/VOLUME) AND MAINLY CONSISTS OF N- U,3- GLUCOSE UNITS, IN A SOLUTION CONTAINING 0.05 TO 5% (WEIGHT/VOLUME) OF A SOLUBILIZING AGENT SELECTED FROM THE GROUP CONSISTING OF SODIUM HYDROXIDE, POTASSIUM HYDROXIDE AND BARIUM HYDROXIDE, THEN DECREASING THE AMOUNT OF SAID SOLUBILIZING REAGENT IN THE SOLUTION BY DIFFUSION, THEREBY ALLOWING THE POLYSACCHARIDE TO GEL.
Claim 3
Dependent Claim
11 words
A gelled polysaccharide according to claim 1 which is a film.
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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |