Patent US3790433A successfully refreshed from Google Patents.
US3790433A
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Multilaminar sheet structure
Assignee: Individual
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Filing: 1970-10-12
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Granted: 1974-02-05
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Expires: 1990-10-12
Abstract
Abstract A multilaminar sheet structure suitable for hygienic and medical purposes comprises a layer, for instance of cellulose foil that forms waves and tunnels after having been exposed to moisture or a liquid, in combination with an absorbent layer, for instance a layer consisting of a nonwoven fabric, and possibly with one or more backing layers.
Inventors
- 👤 H Baron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:54
CPC Classifications
B; B32; B32B; B32B23/00; B32B23/04; B32B23/06; A; A61; A61F; A61F13/00; A61F13/01; A61F13/01021; A61F13/01029; B32B3/00; B32B3/26; B32B3/266; A61F2013/00089; A61F2013/00187; A61F2013/00246; A61F2013/00251; A61F2013/00361; A61F2013/00727; A61F2013/00731; A61F2013/00744; A61F2013/00855; A61F2013/00859; A61F13/15; A61F2013/15008; A61F2013/15048; A61F13/51; A61F2013/51078; A61F13/514; A61F13/51474; A61F2013/51486; A61F2013/51492; A61F13/53; A61F13/534; A61F2013/53445; A61F13/539; A61F2013/5395; B32B2307/00; B32B2307/70; B32B2307/726; B32B2535/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24479; Y10T442/00; Y10T442/60; Y10T442/693
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
98 words
A multilaminar sheet structure suitable for hygenic and medical purposes, comprising: a first layer of non-woven fabric as an absorbent material, a second layer of stretched cellulose foil, major surfaces of said first and second layers in contact with each other, the stretched cellulose foil of said second layer comprising a material for forming waves or corrugations in said second layer when said second layer is wetted by a liquid, and a backing layer, a major surface of which contacts the major surface of the second layer on the side of said second layer opposite said first layer.
Claim 2
Dependent Claim
98 words
A multilaminar sheet structure suitable for hygenic and medical purposes, comprising: a first layer of non-woven fabric as an absorbent material, a second layer of stretched cellulose foil, major surfaces of said first and second layers in contact with each other, the stretched cellulose foil of said second layer comprising a material for forming waves or corrugations in said second layer when said second layer is wetted by a liquid, and a backing layer, a major surface of which contacts the major surface of the second layer on the side of said second layer opposite said first layer.
Claim 3
Dependent Claim
14 words
A multilaminar sheet structure according to claim 1, wherein said second layer is perforated.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |