US4333461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Borated polysaccharide absorbents and absorbent products
Assignee: Colgate Palmolive Co
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Filing: 1979-12-17
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Granted: 1982-06-08
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Expires: 1999-12-17
Abstract
Abstract Guar gum as an exemplification of cis-1,2-diol polysaccharides is first hydrated then thickened by cross-linking with borax and finally dried to powder to flake form, preferably by freeze drying. The resulting particles can absorb up to 100 times their weight or more of aqueous fluids such as urine. Absorbent articles, such as disposable diapers, bandages, and the like are formed with the borax-cross-linked guar gum as absorbent. In a preferred diaper the dry absorbent particles of the borax cross-liked guar gum are placed in the cells of a cellular or bubble-type substrate.
Inventors
- 👤 Ernest G. Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:57
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/60; C; C08; C08B; C08B37/00; C08B37/006; C08B37/0087; C08B37/0093; C08B37/0096; C08K; C08K3/00; C08K3/38
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
134 words
A disposable diaper comprising a body contacting, urine permeable topsheet, a liquid impervious bottom sheet, and an intermediate layer between said topsheet and said bottom sheet comprising the dry borax cross-linked guar gum absorbent perpared by: mixing a cis1,2-diol containing polysaccharide material and water for time sufficient to at least substantially completely hydrate the material; adding an aqueous solution of a source of borate ions to the hydrated material to cross-link same and form a thickened gell mass; and, dehydrating the thickened mass to drive off water contained therein; said absorbent carried by a flexible substrate open cell plastic foam whereby said article is capable of being held in form retaining contact with an animal body such that the absorbent material is capable of coming in contact with body fluids exuded by the body.
Claim 2
Dependent Claim
134 words
A disposable diaper comprising a body contacting, urine permeable topsheet, a liquid impervious bottom sheet, and an intermediate layer between said topsheet and said bottom sheet comprising the dry borax cross-linked guar gum absorbent perpared by: mixing a cis1,2-diol containing polysaccharide material and water for time sufficient to at least substantially completely hydrate the material; adding an aqueous solution of a source of borate ions to the hydrated material to cross-link same and form a thickened gell mass; and, dehydrating the thickened mass to drive off water contained therein; said absorbent carried by a flexible substrate open cell plastic foam whereby said article is capable of being held in form retaining contact with an animal body such that the absorbent material is capable of coming in contact with body fluids exuded by the body.
Claim 3
Dependent Claim
20 words
The absorbent article of claim 1 wherein said absorbent material is disposed in the cells of said plastic foam substrate.
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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) | 1985-06-07 | 1985-12-07 | 1986-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-07 | 1989-12-07 | 1990-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-07 | 1993-12-07 | 1994-06-08 | $7700.00 | Window Closed / Lapsed |