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US3777759A Expired / Lapsed US ⏱️ 0.0 years remaining

Enzyme-dispersible bandage

Assignee: 3M Co
•
Filing: 1972-09-25
•
Granted: 1973-12-11
•
Expires: 1992-09-25
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Abstract

Abstract A readily disposable, multi-ply pad for contacting the body and absorbing body wastes consists of multiple plys of non-woven, fibrous material of good dry- and wet-strength, wet-strength being conferred on the materials by a binder which is essentially unaffected over periods of serveral hours or more by aqueous body wastes, but which is rapidly degraded by exposure to aqueous media containing enzymes; one or moreof the interior plys can be plain, untreated, non-woven fibrous material in the form of an absorbent pad; the whole pad being readily dispersed and disposable in domestic waste disposal systems by the addition of enzyme to the disposal receptacle together with the used pad, and such disposal having the advantage that even long-continued disposal of numerous pads has little or no deleterious effect upon domestic disposal systems.

Inventors

  • 👤 R Oehmke
  • 👤 R Ofstead

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 14:42
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/15203; A61F13/15211

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 11 words
Pad according to claim 1, in which the fibers are cellulosic.
Claim 2
Dependent Claim 15 words
Pad according to claim 1, in which the naturally-occurring material of the binder is gelatin.
Claim 3
Dependent Claim 13 words
Pad according to claim 1, in which the water-repellent coating comprises microcrystalline wax.
Claim 4
Dependent Claim 20 words
Pad according to claim 1, in which the non-woven webs of the inner and outer laminae contain a paper softener.
Claim 5
Dependent Claim 16 words
Pad according to claim 1, of a size adapted for use as a diaper for infants.

References Cited (Backward Citations)

GB1164492A Cited
US3386441A Cited
US3480016A Cited
US3550592A Cited
US3658062A Cited
US3707430A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-12-10 1977-06-11 1977-12-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-12-10 1981-06-11 1981-12-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-12-10 1985-06-11 1985-12-11 $7700.00 Window Closed / Lapsed

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