Patent US4964857A successfully refreshed from Google Patents.
US4964857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biodegradable disposable diaper
Assignee: Individual
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Filing: 1989-10-23
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Granted: 1990-10-23
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Expires: 2009-10-23
Abstract
Abstract The present invention relates to an improved disposable diaper that is biodegradable, sanitary and environmentally safe. In general, the improved diaper has a removable inner sheet of material disposed of by flushing in a toilet or water closet. The remainder of the diaper is made of a biodegradable material that is disposed of in a conventional landfill.
Inventors
- 👤 Charles Osborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:25
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/15203; A61F13/15211; A61F13/15252; A61F2013/15219; A61F13/45; A61F13/49; A61F2013/49068; A61F2013/49076; A61F13/53; A61F13/534; A61F2013/53481; A61F13/84; A61F13/8405; A61F2013/8455
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
124 words
Improved biodegradable disposable diaper comprising: a removable inner sheet having a layer of liquid permeable material, an interior first layer of absorbant material and a first layer of moisture repellant material; a removal means attached to the inner sheet for easy removal of the inner sheet; a second layer of absorbant material associated with the inner sheet; a second layer of moisture repellant material associated with the second layer of absorbant material and extending beyond the inner sheet along both longitudinal and transverse planes; a plurality of perforations in the inner sheet located at the peripheral coterminous points of the inner sheet and second layer of moisture repellant material; and a plurality of fastening tabs attached to the second layer of moisture repellant material.
Claim 2
Dependent Claim
124 words
Improved biodegradable disposable diaper comprising: a removable inner sheet having a layer of liquid permeable material, an interior first layer of absorbant material and a first layer of moisture repellant material; a removal means attached to the inner sheet for easy removal of the inner sheet; a second layer of absorbant material associated with the inner sheet; a second layer of moisture repellant material associated with the second layer of absorbant material and extending beyond the inner sheet along both longitudinal and transverse planes; a plurality of perforations in the inner sheet located at the peripheral coterminous points of the inner sheet and second layer of moisture repellant material; and a plurality of fastening tabs attached to the second layer of moisture repellant material.
Claim 3
Dependent Claim
20 words
An improved biodegradable disposable diaper in accordance with claim 1 wherein the first layer of absorbant material is absorbant cotton.
Claim 4
Dependent Claim
22 words
An improved biodegradable disposable diaper in accordance with claim 1 wherein the first layer of moisture repellent material is a coated paper.
Claim 5
Dependent Claim
21 words
An improved biodegradable disposable diaper in accordance with claim 3 wherein the coating on the coated paper is a natural wax.
Claim 6
Dependent Claim
22 words
An improved biodegradable disposable diaper in accordance with claim 1 wherein the second layer of moisture repellant material is a coated paper.
Claim 7
Dependent Claim
21 words
An improved biodegradable disposable diaper in accordance with claim 5 wherein the coating on the coated paper is a natural wax.
Claim 8
Dependent Claim
20 words
An improved biodegradable disposable diaper in accordance with claim 1 wherein the second layer of absorbant material is absorbant cotton.
Claim 9
Dependent Claim
17 words
An improved biodegradable disposable diaper in accordance with claim 1 wherein the removal means is a drawstring.
Claim 10
Dependent Claim
16 words
An improved biodegradable disposable diaper in accordance with claim 8 wherein the drawstring is twisted paper.
Claim 11
Dependent Claim
136 words
An improved biodegradable disposable diaper comprising: a removable inner sheet having a layer of liquid permeable material, an interior first layer of absorbant material and a first layer of coated paper attached to the absorbant material; a drawstring attached to the inner sheet along its Periphery for easy removal of the inner sheet; a second layer of absorbant material associated with the coated paper of the inner sheet; a second layer of coated paper associated with the second layer of absorbant material and extending beyond the inner sheet along both longitudinal and transverse planes; a plurality of perforations in the inner sheet located at the peripheral coterminous points of the inner sheet and second layer of coated paper; and a plurality of fastening tabs attached to the extended portion of the second layer of coated paper.
Claim 12
Dependent Claim
136 words
An improved biodegradable disposable diaper comprising: a removable inner sheet having a layer of liquid permeable material, an interior first layer of absorbant material and a first layer of coated paper attached to the absorbant material; a drawstring attached to the inner sheet along its Periphery for easy removal of the inner sheet; a second layer of absorbant material associated with the coated paper of the inner sheet; a second layer of coated paper associated with the second layer of absorbant material and extending beyond the inner sheet along both longitudinal and transverse planes; a plurality of perforations in the inner sheet located at the peripheral coterminous points of the inner sheet and second layer of coated paper; and a plurality of fastening tabs attached to the extended portion of the second layer of coated paper.
Claim 13
Dependent Claim
23 words
An improved biodegradable disposable diaper in accordance with claim 10 wherein the first layer of coated paper is coated with a natural wax.
Claim 14
Dependent Claim
23 words
An improved biodegradable disposable diaper in accordance with claim 10 wherein the second layer of coated paper is coated with a natural wax.
Claim 15
Dependent Claim
20 words
An improved biodegradable disposable diaper in accordance with claim 10 wherein the second layer of absorbant material is absorbant cotton.
Claim 16
Dependent Claim
16 words
An improved biodegradable disposable diaper in accordance with claim 10 wherein the drawstring is twisted paper.
Claim 17
Dependent Claim
177 words
An improved biodegradable disposable diaper comprising: a removable inner sheet having a layer of liquid permeable material, a first layer of absorbant cotton; a first layer of paper coated with a natural wax attached to the first layer of absorbant cotton and having hollow channels along its periphery; a twisted paper drawstring attached to the inner sheet along its periphery through the hollow channels therein for easy removal of the inner sheet; a second layer of absorbant cotton associated with the first layer of paper coated with a natural wax; a second layer of paper coated with a natural wax associated with the second layer of absorbant cotton and extending beyond the inner sheet along both longitudinal and transverse planes; a plurality of perforations in the inner sheet located at the peripheral coterminous points of the inner sheet and second layer of paper coated with a natural wax for easy detachment of the inner sheet; and a plurality of fastening tabs attached to the extended portion of the second layer of paper coated with a natural wax.
Claim 18
Dependent Claim
177 words
An improved biodegradable disposable diaper comprising: a removable inner sheet having a layer of liquid permeable material, a first layer of absorbant cotton; a first layer of paper coated with a natural wax attached to the first layer of absorbant cotton and having hollow channels along its periphery; a twisted paper drawstring attached to the inner sheet along its periphery through the hollow channels therein for easy removal of the inner sheet; a second layer of absorbant cotton associated with the first layer of paper coated with a natural wax; a second layer of paper coated with a natural wax associated with the second layer of absorbant cotton and extending beyond the inner sheet along both longitudinal and transverse planes; a plurality of perforations in the inner sheet located at the peripheral coterminous points of the inner sheet and second layer of paper coated with a natural wax for easy detachment of the inner sheet; and a plurality of fastening tabs attached to the extended portion of the second layer of paper coated with a natural wax.
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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) | 1993-10-22 | 1994-04-23 | 1994-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-22 | 1998-04-23 | 1998-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-22 | 2002-04-23 | 2002-10-23 | $7700.00 | Window Closed / Lapsed |