← Back to Patent Explorer
US3763502A Expired / Lapsed US ⏱️ 0.0 years remaining

Disposable article liner

Assignee: SUREN KEOSEIAN R
•
Filing: 1969-01-09
•
Granted: 1973-10-09
•
Expires: 1989-01-09
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A disposable article liner such as for bedpans and emesis basins is provided which has a four-ply construction consisting of a base layer of water-disintegratable paper such as tissue or toilet paper stock, an extremely thin coating of polyethylene which serves as a hold-out coating for a subsequent thin layer of a continuous water-insoluble coating which may be made of either wax modified for adhesion and flexibility with 5 to 40% ethyl vinyl acetate polyethylene, or other hydrophobic coating materials such as silicates, silicones or cellulose derivatives such as ethyl cellulose or nitro-cellulose, and lastly, an additional top layer of the same water-disintegratable paper used for the base layer, adhered to the insoluble water-repellent coating. The liner is very thin but of adequate tensile strength and resistance to human excrement but disintegrates in approximately five to ten seconds in contact with water when deposited in a toilet bowl or disposal system. Other waxes, paraffins and coatings of still other water-insoluble materials may be substituted which have the water resistant properties required.

Inventors

  • 👤 D Laumann

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 03:30
CPC Classifications
A; A61; A61G; A61G9/00; A61G9/003; Y; Y10; Y10S; Y10S4/00; Y10S4/18

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 35 words
A liner according to claim 1 wherein the polythene hold-out coating consists of polyethylene of a density suitable to prevent the water-insoluble coating from sinking into the paper and rendering it a waxed wet-strength paper.
Claim 2
Dependent Claim 34 words
A liner according to claim 1 wherein the insoluble water-proof coating is a combination of ethyl vinyl acetate polyethylene-paraffin-microwax which exhibits extremely little physical strength and which physically breaks up in a disposal system.
Claim 3
Dependent Claim 14 words
A liner according to claim 1 wherein the tissue paper is of water-soluble quality.
Claim 4
Dependent Claim 51 words
A 6-ply liner having top and bottom paper sheets and comprising a water-disintegratable base tissue sheet, a thin polyethylene hold-out coating on one side of the base sheet, a water-insoluble coating on top of the polyethylene coating and laminated inversely with an identically coated sheet to provide double protection against leakage.

References Cited (Backward Citations)

US2649859A Cited
US3070095A Cited
US2897109A Cited
US3036573A Cited
US2896626A Cited
US3066315A Cited
US3115644A Cited
US3196874A Cited
US3263241A Cited
US3249950A Cited
US3475767A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-10-08 1977-04-09 1977-10-09 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-10-08 1981-04-09 1981-10-09 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-10-08 1985-04-09 1985-10-09 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag