US5003060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Readily dispersed/dissolved porous biopolymer granules
Assignee: Rhodia Chimie SAS
•
Filing: 1987-06-19
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Granted: 1991-03-26
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Expires: 2007-06-19
Abstract
Abstract Solid, free-flowing and nondusting porous biopolymer, e.g., xanthan gum, granules are produced in fluidized bed and are quickly dispersed/dissolved in aqueous media for use as thickening agents for a wide variety of applications.
Inventors
- 👤 Bernard Vinot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:37
CPC Classifications
C; C13; C13B; C13B50/00; C08; C08J; C08J3/00; C08J3/02; C08J3/03; B; B01; B01J; B01J2/00; B01J2/16; C08K; C08K5/00; C08K5/0008; C08J2300/00; C08J2300/10; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
27 words
Solid, free-flowing and nondusting porous polysaccharide biopolymer granules readily dispersible and soluble in water, said granules comprising at least one wetting agent, dispersing agent, or combination thereof.
Claim 2
Dependent Claim
27 words
Solid, free-flowing and nondusting porous polysaccharide biopolymer granules readily dispersible and soluble in water, said granules comprising at least one wetting agent, dispersing agent, or combination thereof.
Claim 3
Dependent Claim
27 words
The porous biopolymer granules as defined by claim 1, having an average particle size of 0.5 to 2 mm and an apparent density of less than 0.7.
Claim 4
Dependent Claim
19 words
The porous biopolymer granules as defined by claim 1, having a degree of porosity of from 40 to 60%.
Claim 5
Dependent Claim
25 words
The porous biopolymer granules as defined by claim 1, comprising from 0.5 to 10% by weight of said at least one wetting and/or dispersing agent.
Claim 6
Dependent Claim
19 words
The porous biopolymer granules as defined by claim 1, comprising up to 12% by weight of residual moisture content.
Claim 7
Dependent Claim
20 words
The porous biopolymer granules as defined by claim 1, said at least one wetting and/or dispersing agent comprising a surfactant.
Claim 8
Dependent Claim
57 words
The porous biopolymer granules as defined by claim 5, said surfactant comprising a soap of a fatty acid, sulfate or sulfated compound, a phosphoric acid ester of an oxyethyleneated compound, an alkali metal sulfonate, polyoxyethyleneated alkylphenol, polyoxyethyleneated and/or polyoxypropyleneated fatty alcohol or fatty acid, fatty acid alkanolamide, an ester of a polyhydric alcohol or polyoxyethyleneated derivative thereof.
Claim 9
Dependent Claim
31 words
The porous biopolymer granules as defined by claim 7, said surfactant comprising a polyoxyethyleneated nonylphenol, an alkali metal alkylbenzenesulfonate, an alkali metal sulfosuccinate, a sugar glyceride, or a polyoxyethyleneated fatty alcohol.
Claim 10
Dependent Claim
40 words
The porous biopolymer granules as defined by claim 1, said at least one wetting and/or dispersing agent comprising a homopolymer of an unsaturated carboxylic acid or copolymer thereof with an α-olefin, an alkenylsulfonate, a naphthalenesulfonate or an alkylnaphthalenesulfonate or polyphosphate.
Claim 11
Dependent Claim
26 words
The porous biopolymer granules as defined by claim 1, said at least one wetting and/or dispersing agent comprising admixture of sodium polymethylene naphthalenesulfonate and sodium dioctylsulfosuccinate.
Claim 12
Dependent Claim
14 words
The porous biopolymer granules as defined by claim 1, said biopolymer comprising xanthan gum.
Claim 13
Dependent Claim
21 words
The porous biopolymer granules as defined by claim 1, said biopolymer being mixed with a natural, modified natural or synthetic gum.
Claim 14
Dependent Claim
68 words
A process for the production of the porous biopolymer granules as defined by claim 1, comprising (i) fluidizing a biopolymer powder in a stream of gas (ii) agglomerating the particles thus fluidized by spraying an aqueous fluid thereon, (iii) at least one wetting and/or dispersing agent either being admixed with said biopolymer powder or incorporated in the spray of aqueous liquid, and (iv) drying the granules thus produced.
Claim 15
Dependent Claim
27 words
The process as defined by claim 13, wherein the amount of aqueous liquid sprayed comprises from 5 to 100% by weight of the mass to be granulated.
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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) | 1994-03-25 | 1994-09-24 | 1995-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-25 | 1998-09-24 | 1999-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-25 | 2002-09-24 | 2003-03-26 | $7700.00 | Window Closed / Lapsed |