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US3850652A Expired / Lapsed US ⏱️ 0.0 years remaining

Multi-purpose membrane

Assignee: Anne Co Ltd
•
Filing: 1973-06-21
•
Granted: 1974-11-26
•
Expires: 1993-06-21
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Abstract

Abstract A multi-purpose membranous material having high flexibility and mechanical strength, being non-absorbable by other materials in contact therewith, capable of holding aqueous liquids during use and to dissolve in water when disposed of after use, said membranous material being formed at least in part of a member of the group consisting of alkylhydroxy cellulose, natural rubber latex, synthetic rubber latex, polyethylene, oxide, and mixtures thereof. The membranous material may be used as film either by itself or pasted to various bases, as sizing for paper or cloth. Specific applications for the material include hygienic or sanitary articles, baby''s wear, disposable diapers or inserts therefor, and many others. The material may also be used for making carrying bags for said articles which may be disposed of together with the articles by throwing them into a toilet bowl.

Inventors

  • 👤 K Asaka
  • 👤 M Ishihara

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 10:07
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/10; A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/28; A61L15/42; A61L15/60; C; C08; C08L; C08L1/00; C08L1/08; C08L1/26; C08L1/28

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 58 words
A MULTI-PURPOSE MEMBRANOUS MATERIAL HAVING HIGH FLEXIBILITY AND CHEMICAL STRENGTH, BEING NON-ABSORBABLE BY OTHER MATERIALS IN CONTACT THEREWITH, CAPABLE O HOLDING BODY FLUIDS DURING USE AND REDILY DISPERSING WHEN DISPOSED OF IN WATER AFTER USE, SAID MEMBRANOUS MATERIAL BEING FORMED AT LEAST IN PART OF A HYDROXYALKYLATED CELLULOSE SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA:
Claim 2
Dependent Claim 58 words
A MULTI-PURPOSE MEMBRANOUS MATERIAL HAVING HIGH FLEXIBILITY AND CHEMICAL STRENGTH, BEING NON-ABSORBABLE BY OTHER MATERIALS IN CONTACT THEREWITH, CAPABLE O HOLDING BODY FLUIDS DURING USE AND REDILY DISPERSING WHEN DISPOSED OF IN WATER AFTER USE, SAID MEMBRANOUS MATERIAL BEING FORMED AT LEAST IN PART OF A HYDROXYALKYLATED CELLULOSE SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA:
Claim 3
Dependent Claim 12 words
A composition consisting essentially of fibers and the material of claim 1.
Claim 4
Dependent Claim 26 words
The membranous material according to claim 1, comprising further an additive selected from the group consisting of: polyols from glycerol to hexitol; dextrin; and hydroxypropyl starch.
Claim 5
Dependent Claim 32 words
The membranous material according to claim 1, consisting of about 100% methylhydroxyethyl cellulose of high polymerization, having a C.P.S. viscosity ranging from about 2,700 to about 3, 000, 2%/water at 20* Centigrade.
Claim 6
Dependent Claim 41 words
The membranous material according to claim 1, consisting of about 60% by weight of methylhydroxyethyl cellulose of high polymerization having a C.P.S. viscosity ranging from about 2,700 to about 3,000, 2%/water at 20* Centigrade, and about 40% by weight roasted dextrin.
Claim 7
Dependent Claim 40 words
The membranous material according to claim 1, consisting of about 70% by weight of methylhydroxyethyl cellulose of high polymerization having a C.P.S. viscosity ranging from about 2,700 to about 3,000, 2%/water at 20* Centigrade, and about 30% of hydroxypropyl starch.

References Cited (Backward Citations)

US2839419A Cited
US3709876A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-11-25 1978-05-27 1978-11-26 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-11-25 1982-05-27 1982-11-26 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-11-25 1986-05-27 1986-11-26 $7700.00 Window Closed / Lapsed

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