US4846932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water setting paper
Assignee: KUROMATSU Corp Co Ltd 3-3 TORANOMON 3-CHOME MINATO-KU TOKYO
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Filing: 1986-12-17
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Granted: 1989-07-11
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Expires: 2006-12-17
Abstract
Abstract Water setting paper (high water-absorbency material) comprised of pulp fiber, water-soluble resin and high wate-absorbency resin is produced in sheet form for use in urine containers or portable toilets. Water setting paper or the high water-absorbency sheet thus formed absorbs and solidifies the urine, allowing the urine to be disposed of easily, rapidly and hygienically.
Inventors
- 👤 Takeshi Karita
- 👤 Yoshiro Saito
- 👤 Shunichiro Kuromatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:09
CPC Classifications
D; D21; D21H; D21H27/00; D21H27/30; D21H27/32; A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/28; A61L15/42; A61L15/60; D21H21/00; D21H21/14; D21H21/22; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/25; Y10T428/253; Y10T428/31504; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
27 words
A water setting paper formed of high water-absorbency material in sheet form and comprising pulp fiber, water-soluble resin and high water-absorbency cross-linked resin formed into a sheet.
Claim 2
Dependent Claim
27 words
A water setting paper formed of high water-absorbency material in sheet form and comprising pulp fiber, water-soluble resin and high water-absorbency cross-linked resin formed into a sheet.
Claim 3
Dependent Claim
40 words
The water setting paper of claim 1 wherein the high water-absorbency resin is comprised of a synthetic resin produced by the crosslinking of polyacrylic acid, polystyrene sulfonic acid, polyvinyl pyridine, maleic anhydride, carboxylmethylcellulose, polyethylene oxide, polyvinyl alcohol or cellulose ether.
Claim 4
Dependent Claim
33 words
The water setting paper of claim 1 wherein the water-soluble resin is comprised of carboxymethylcellulose (CMC-H), carboxyethylcellulose (CEC-H), or the respective aluminum salt, barium salt, zinc salt, tin salt or manganese salt thereof.
Claim 5
Dependent Claim
17 words
A urine disposal means comprising the water setting paper of claim 1 inserted into a urine bottle.
Claim 6
Dependent Claim
17 words
A urine disposal means comprising the water setting paper of claim 1 inserted into a portable toilet.
Claim 7
Dependent Claim
33 words
The water setting paper of claim 1 comprising a sandwich of the high water-absorbency resin between two paper sheets each of which are comprised of pulp fibers, water-soluble resin, and high water-absorbency resin.
Claim 8
Dependent Claim
66 words
The water setting paper of claim 1 wherein the higher water-absorbency resin is comprised of a synthetic resin produced by the crosslinking of polyacrylic acid, polystyrene sulfonic acid, polyvinyl pyridine, maleic anhydride, carboxylmethylcellulose, polyethylene oxide, polyvinyl alcohol or cellulose ether; and the water-soluble resin is comprised of carboxymethylcellulose (CMC-H), carboxyethylcellulose (CEC-H), or the respective aluminum salt, barium salt, zinc salt, tin salt or manganese salt thereof.
Claim 9
Dependent Claim
53 words
The water setting paper of claim 1 wherein said sheet has three layers forming a sandwich structure having two outer layers and an inner layer; said inner layer being formed of said high water-absorbency resin and said two outer layers being formed of a mixture of said pulp fiber and said water-soluble resin.
Claim 10
Dependent Claim
53 words
The water setting paper of claim 2 wherein said sheet has three layers forming a sandwich structure having two outer layers and an inner layer; said inner layer being formed of said high water-absorbency resin and said two outer layers being formed of a mixture of said pulp fiber and said water-soluble resin.
Claim 11
Dependent Claim
53 words
The water setting paper of claim 3 wherein said sheet has three layers forming a sandwich structure having two outer layers and an inner layer; said inner layer being formed of said high water-absorbency resin and said two outer layers being formed of a mixture of said pulp fiber and said water-soluble resin.
Claim 12
Dependent Claim
53 words
The water setting paper of claim 7 wherein said sheet has three layers forming a sandwich structure having two outer layers and an inner layer; said inner layer being formed of said high water-absorbency resin and said two outer layers being formed of a mixture of said pulp fiber and said water-soluble resin.
Claim 13
Dependent Claim
14 words
The water setting paper of claim 11 wherein said water soluble resin is carboxymethylcellulose.
References Cited (Backward Citations)
US3935099A
Cited
US4076663A
Cited
JPS5562930A
Cited
GB2119709A
Cited
JPS5967047A
Cited
US4619862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-10 | 1993-01-09 | 1993-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-10 | 1997-01-09 | 1997-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-10 | 2001-01-09 | 2001-07-11 | $7700.00 | Window Closed / Lapsed |