US4920171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-resistant, water-flushable paper compositions
Assignee: MONADNOCK PAPER MILLS Inc BENNINGTON NEW HAMPSHIRE A CORP OF NEW HAMPSHIRE
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Filing: 1987-02-24
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Granted: 1990-04-24
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Expires: 2007-02-24
Abstract
Abstract The invention is directed to a coating composition for application to a flushable cellulosic based waterleaf sheet to impart transitory water repellency to at least one surface of the sheet. The composition comprises between 20% by weight to about 70% by weight of relatively large particle size delaminated clay in combination with a polyethylene based polymer that has been produced by the drying of a colloidal polyethylene in water composition with the said clay.
Inventors
- 👤 Alexander E. Hutton, Jr.
- 👤 Richard E. Burke
- 👤 Stanley P. Wheeler, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:08
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/38; D21H19/40; D21H17/00; D21H19/44; D21H19/56; D21H21/00; D21H21/14; D21H21/18; D21H21/20; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/27
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
126 words
A coating composition for application to a flushable cellulosic based waterleaf sheet and for imparting transitory water repellency to at least one surface of said flushable cellulosic waterleaf sheet when applied on said waterleaf sheet at a coverage of from about three pounds to about 10 pounds of coating for every 3,000 square feet of waterleaf sheet, said coating composition consisting essentially of between 20% by weight to about 70% by weight of relatively large particle size delaminated clay, with the balance being a polyethylene based resin composition produced by the drying of a colloidal polyethylene in water composition together with said clay; whereby the resultant surface coating provides surface water repellency without impairing the ability of the waterleaf sheet to be disposed of by flushing.
Claim 2
Dependent Claim
126 words
A coating composition for application to a flushable cellulosic based waterleaf sheet and for imparting transitory water repellency to at least one surface of said flushable cellulosic waterleaf sheet when applied on said waterleaf sheet at a coverage of from about three pounds to about 10 pounds of coating for every 3,000 square feet of waterleaf sheet, said coating composition consisting essentially of between 20% by weight to about 70% by weight of relatively large particle size delaminated clay, with the balance being a polyethylene based resin composition produced by the drying of a colloidal polyethylene in water composition together with said clay; whereby the resultant surface coating provides surface water repellency without impairing the ability of the waterleaf sheet to be disposed of by flushing.
Claim 3
Dependent Claim
37 words
The coating composition of claim 1 in which said balance of colloidal polyethylene comprises about 55 to about 65 parts by weight of a 50% solids aqueous suspension of said polyethylene, the balance being clay and water.
Claim 4
Dependent Claim
26 words
The coating composition of claim 2 wherein said colloidal polyethylene is present in an amount of about 60 parts by weight of said aqueous coating composition.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-23 | 1993-10-23 | 1994-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-23 | 1997-10-23 | 1998-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-23 | 2001-10-23 | 2002-04-24 | $7700.00 | Window Closed / Lapsed |