US4944734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biodegradable incontinence device with embedded granules
Assignee: Micro Pak Inc
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Filing: 1989-06-26
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Granted: 1990-07-31
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Expires: 2009-06-26
Abstract
Abstract The present invention concerns a biodegradable incontinence device such as a diaper. The incontinence device has biodegradability enhancer granules containing an enzyme such as cellulase or hemicellulase embedded therein. The outer layers of the device are preferably made of a biodegradable material such as treated paper or rayon.
Inventors
- 👤 Donald F. H. Wallach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:41
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/534; A61F13/537; A61F13/51; A61F13/511; A61F13/51121; A61F13/512; A61F13/513; A61F13/51305; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/28; A61L15/38; A61L15/42; A61L15/60; A61L15/62; A61F13/15203; A61F13/15252; A61F2013/51059; A61F2013/51061; A61F2013/51143; A61F2013/530481; A61F2013/530583; A61F2013/530649; A61F2013/530795; A61F2013/53481; A61F13/84; A61F13/8405; A61F2013/8438; A61F2013/8447; A61F2013/8452
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
110 words
An incontinence device having improved biodegradability comprising: an inner layer which is substantially porous to allow the transfer of an aqueous solution into said device, said inner layer being made of a material which is substantially nonwettable; one or more absorptive layers formed primarily of a cellulosic material, said cellulosic material having biodegradability enhancer granules embedded therein, said enhancer granules containing of a particulate material which degrades over time encapsulating a biodegradability enhancer agent selected from the group consisting of cellulase, hemicellulase or related cellulose degrading enzymes, and bacteria or spores which release cellulase, hemicellulase or related cellulose degrading enzymes; and an outer layer which is substantially impermeable to water.
Claim 2
Dependent Claim
110 words
An incontinence device having improved biodegradability comprising: an inner layer which is substantially porous to allow the transfer of an aqueous solution into said device, said inner layer being made of a material which is substantially nonwettable; one or more absorptive layers formed primarily of a cellulosic material, said cellulosic material having biodegradability enhancer granules embedded therein, said enhancer granules containing of a particulate material which degrades over time encapsulating a biodegradability enhancer agent selected from the group consisting of cellulase, hemicellulase or related cellulose degrading enzymes, and bacteria or spores which release cellulase, hemicellulase or related cellulose degrading enzymes; and an outer layer which is substantially impermeable to water.
Claim 3
Dependent Claim
36 words
The incontinence device of claim 1 wherein said capsule of said enhancer granules comprises a biodegradable synthetic sponge composition which absorbs water and releases said biodegradability enhancer agent from said granules after said absorption of water.
Claim 4
Dependent Claim
45 words
The incontinence device of claim 2 wherein said synthetic sponge composition comprises a non-hydrated material which includes a carboxylic acid with a substantial hydrophobic region and a cellulosic carbohydrate, which material is capable of being hydrated and cross-linked simultaneously in the presence of the water.
Claim 5
Dependent Claim
16 words
The incontinence device of claim 3 wherein said synthetic sponge composition further comprises a cross-linking agent.
Claim 6
Dependent Claim
21 words
The incontinence device of claim 4 wherein said cross-linking agent comprises a metallo-organic cross-linking agent which includes a multivalent metal ion.
Claim 7
Dependent Claim
20 words
The incontinence device of claim 5 wherein said metallo-organic cross-linking agent comprises both said carboxylic acid and said cross-linking agent.
Claim 8
Dependent Claim
14 words
The incontinence device of claim 3 wherein said carboxylic acid comprises a fatty acid.
Claim 9
Dependent Claim
34 words
The incontinence device of claim 7 wherein said fatty acid is selected from the group consisting of acetic acid, lauric acid, palmitic acid, stearic acid, oleic acid, benzoic acid, and mixtures and derivatives thereof.
Claim 10
Dependent Claim
26 words
The incontinence device of claim 3 wherein said cellulosic carbohydrate is selected from the group consisting of carboxymethylcellulose, cellulosic gums, and their derivatives and chemical analogues.
Claim 11
Dependent Claim
15 words
The incontinence device of claim 3 wherein said absorptive layer further comprises a superabsorber composition.
Claim 12
Dependent Claim
22 words
The continence device of claim 10 wherein said superabsorber composition comprises said synthetic sponge composition, or a derivative or chemical analog thereof.
Claim 13
Dependent Claim
34 words
The incontinence device of claim 1 wherein said absorptive layer comprises a plurality of absorptive layers with increasing density in the packing of said cellulosic material at the portion closest to said outer layer.
Claim 14
Dependent Claim
14 words
The incontinence device of claim 1 wherein said inner layer comprises a biodegradable material.
Claim 15
Dependent Claim
41 words
The incontinence device of claim 13 wherein said biodegradable material is selected from the group consisting of non-woven cellulosic material, high tensile strength perforated paper, non-woven rayon, and loosely woven rayon, said biodegradable material being treated to make the fibers nonwettable.
Claim 16
Dependent Claim
35 words
The incontinence device of claim 14 wherein said biodegradable material is treated with a material selected from the group consisting of silicone, lower alkyl silicone halide, and insoluble fatty acids to make the fibers nonwettable.
Claim 17
Dependent Claim
14 words
The incontinence device of claim 1 wherein said outer layer comprises a biodegradable material.
Claim 18
Dependent Claim
41 words
The incontinence device of claim 16 wherein said biodegradable material is selected from the group consisting of non-woven cellulosic material, high tensile strength perforated paper, non-woven rayon, and loosely woven rayon, said biodegradable material being treated to make the fibers nonwettable.
Claim 19
Dependent Claim
35 words
The incontinence device of claim 17 wherein said biodegradable material is treated with a material selected from the group consisting of silicone, lower alkyl silicone halide, and insoluble fatty acids to make the fibers nonwettable.
Claim 20
Dependent Claim
19 words
The incontinence device of claim 1 further comprising a wicking layer between said dinner layer and said absorptive layer.
Claim 21
Dependent Claim
12 words
The incontinence device of claim 1 wherein said device comprises a diaper.
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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) | 1993-07-30 | 1994-01-29 | 1994-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-30 | 1998-01-29 | 1998-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-30 | 2002-01-29 | 2002-07-31 | $7700.00 | Window Closed / Lapsed |