US3790433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilaminar sheet structure
Assignee: Individual
•
Filing: 1970-10-12
•
Granted: 1974-02-05
•
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 04:13
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.
References Cited (Backward Citations)
DE695783C
Cited
DE714577C
Cited
DE965598C
Cited
US2626883A
Cited
AT194075B
Cited
GB778813A
Cited
US2959511A
Cited
US3017304A
Cited
US3077882A
Cited
DE1265112B
Cited
FR1380103A
Cited
US3331728A
Cited
US3419006A
Cited
US3521624A
Cited
US3543750A
Cited
US3602220A
Cited
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 |