Patent US4522203A successfully refreshed from Google Patents.
US4522203A
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Water impervious materials
Assignee: JPMorgan Chase Bank NA
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Filing: 1984-03-09
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Granted: 1985-06-11
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Expires: 2004-03-09
Abstract
Abstract A water impervious laminated material is described. A preferred embodiment comprises a three-layer plastic film sandwiched between and fuse bonded to two layers of conjugate fibers having a low melting sheath and a high melting core. The inner layer of the plastic film is relatively high melting while the two outer plies of the film are low melting. The sheaths of the conjugate fibers have been fuse bonded to the plastic film at a temperature below the melt temperature of the cores of the conjugate fibers so that the cores retain their initial fiber-like integrity.
Inventors
- 👤 Alfred T. Mays
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:13
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; A; A41; A41D; A41D13/00; A41D13/05; A41D13/11; A61; A61B; A61B46/00; A61B46/40; A61L; A61L31/00; A61L31/04; A61L31/048; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; B32B27/06; B32B27/08; B32B27/30; B32B27/306; B32B27/32; B32B5/00; B32B5/02; B32B5/08; B32B7/00; B32B7/02; B32B7/027; B32B7/04; B32B7/12; B01D2239/00; B01D2239/02; B01D2239/0216; B01D2239/0233; B01D2239/06; B01D2239/065; B01D2239/0668; B01D2239/0672; B32B2262/00; B32B2262/12; B32B2307/00; B32B2307/70; B32B2307/726; B32B2307/7265; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/31504; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31928; Y10T442/00; Y10T442/60; Y10T442/637; Y10T442/674; Y10T442/678
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
162 words
A water impervious laminated material comprising an inner plastic film sandwiched between two layers of conjugate fibers, each of said layers of conjugate fibers having a first face and an opposite face, said conjugate fibers being composed of a lower melting component and a higher melting component, wherein a substantial proportion of the surfaces of said fibers comprises said lower melting component, said plastic film comprising a three-layer structure having an inner layer sandwiched between and bonded to two outer layers, said inner layer of said film structure having a melt temperature higher than the melt temperatures of each of said outer layers of said film structure, said lower melting components of both layers of said conjugate fibers which lie on said first faces having been fuse bonded to the adjacent outer layers of said film structure at a temperature below the melt temperature of said higher melting component of said fibers, so that the latter component retains its initial fiber-like integrity.
Claim 2
Dependent Claim
162 words
A water impervious laminated material comprising an inner plastic film sandwiched between two layers of conjugate fibers, each of said layers of conjugate fibers having a first face and an opposite face, said conjugate fibers being composed of a lower melting component and a higher melting component, wherein a substantial proportion of the surfaces of said fibers comprises said lower melting component, said plastic film comprising a three-layer structure having an inner layer sandwiched between and bonded to two outer layers, said inner layer of said film structure having a melt temperature higher than the melt temperatures of each of said outer layers of said film structure, said lower melting components of both layers of said conjugate fibers which lie on said first faces having been fuse bonded to the adjacent outer layers of said film structure at a temperature below the melt temperature of said higher melting component of said fibers, so that the latter component retains its initial fiber-like integrity.
Claim 3
Dependent Claim
38 words
The material of claim 1, in which the melt temperature of each of the outer layers of the film structure is no more than 35° C. higher or lower than the lower melting component of said conjugate fibers.
Claim 4
Dependent Claim
26 words
The material of claim 1, in which the inner layer of said film structure comprises isotactic polypropylene and the two outer layers comprise ethylene/vinyl acetate copolymer.
Claim 5
Dependent Claim
15 words
The material of claim 1, wherein the conjugate fiber is a polyethylene/polyester sheath/core bi-component fiber.
Claim 6
Dependent Claim
22 words
The material of claim 4, wherein the inner layer of the film comprises isotactic polypropylene and the two outer layers comprise polyethylene.
Claim 7
Dependent Claim
9 words
A surgical drape comprising the material of claim 1.
Claim 8
Dependent Claim
10 words
A surgical face mask comprising the material of claim 1.
Claim 9
Dependent Claim
17 words
The material of claim 1, wherein said material is bonded by means of a heated embossing calender.
Claim 10
Dependent Claim
40 words
The material of claim 1 in which at least one of said two layers of conjugate fibers is blended with non-conjugate fusible fibers, with the proviso that said first face thereof contains a plurality of conjugate fibers in said blend.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |