US3883505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of solubilizing polysaccharides
Assignee: Ajinomoto Co Inc
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Filing: 1974-05-20
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Granted: 1975-05-13
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Expires: 1994-05-20
Abstract
Abstract Polysaccharides soluble in water are obtained by contacting water-insoluble, naturally occurring polysaccharides with strong, hot, aqueous solutions of urea, thiourea, guanidine, and their Nlower-alkyl derivatives. No change in primary chemical structure nor shortening of polymer chains occurs under mild processing conditions. Polysaccharides may be separated from other constituents of natural raw materials in soluble form by this method.
Inventors
- 👤 Junji Hamuro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:10
CPC Classifications
C; C08; C08B; C08B37/00; A; A61; A61K; A61K36/00; A61K36/06; A61K36/07; A61K36/076; A61K36/13; A61K36/18; A61K36/88; A61K36/899
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
36 words
A METHOD OF IMPROVING THE SOLUBILITY OF A POLYSACCHARIDE POORLY SOLUBLE IN WATER WHICH COMPRISES: A. CONTACTING SAID POLYSACCHARIDE WITH AN AQUEOUS SOLUTION OF AT LEAST TWO MOLES PER LITER OF A COMPOUND OF THE FORMULA
Claim 2
Independent Claim
36 words
A METHOD OF IMPROVING THE SOLUBILITY OF A POLYSACCHARIDE POORLY SOLUBLE IN WATER WHICH COMPRISES: A. CONTACTING SAID POLYSACCHARIDE WITH AN AQUEOUS SOLUTION OF AT LEAST TWO MOLES PER LITER OF A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
31 words
A method as set forth in claim 1, wherein said polysaccharide, prior to said contacting, is derived from a member of the group consisting of fungi, bacteria, yeasts, wood, and grass.
Claim 4
Dependent Claim
20 words
A method as set forth in claim 1, wherein said polysaccharide, prior to said contacting, is derived from living matter.
Claim 5
Dependent Claim
15 words
A method as set forth in claim 1, wherein said polysaccharide is a Beta -1,3-glucan.
Claim 6
Dependent Claim
20 words
A method as set forth in claim 2, wherein said member is Coriolus versicolor, Coriolus hirsutus, Trametes sanguinea, and holocellulose.
Claim 7
Dependent Claim
14 words
A method as set forth in claim 2, wherein said member is Poria cocos.
Claim 8
Dependent Claim
17 words
A method as set forth in claim 1, wherein said polysaccharide is pachyman, lentinan, xylan, or galactoglucomannan.
Claim 9
Dependent Claim
28 words
A method as set forth in claim 1, wherein said polysaccharide is contacted with said solution for at least 1 hour at a temperature of 40* to 70*C.
References Cited (Backward Citations)
US3345556A
Cited
US3555006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |