US4977016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low permeability fabric
Assignee: STERN & STERN INDUSTRIES Inc 708 THIRD AVENUE NEW YORK NEW YORK 10017 A CORP OF NEW YORK
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Filing: 1988-10-28
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Granted: 1990-12-11
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Expires: 2008-10-28
Abstract
Abstract A strong, lightweight, thin, flexible fabric of low permeability comprising an uncoated woven cloth characterized by a permeability of not more than one cubic foot of air per minute per square foot of cloth (0.5 cm3/sec/cm2) at a pressure drop of 0.5 inch of water (1.27 cm) across the cloth. The cloth is calendered on both sides to reduce its permeability.
Inventors
- 👤 Peter B. Thornton
- 👤 Stanley H. Cone
- 👤 George W. Booz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:27
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/02; B60R21/16; B60R21/23; B60R21/235; D; D03; D03D; D03D1/00; D03D1/02; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/1352; Y10T428/1362; Y10T442/00; Y10T442/30
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
54 words
A strong, lightweight, thin, flexible fabric of low permeability comprising an uncoated woven cloth characterized by a permeability of not more than one cubic foot of air .per minute per square foot of cloth (0.5 cm 3 /sec/cm 2 ) at a pressure drop of 0.5 inch of water (1.27 cm) across the cloth.
Claim 2
Dependent Claim
54 words
A strong, lightweight, thin, flexible fabric of low permeability comprising an uncoated woven cloth characterized by a permeability of not more than one cubic foot of air .per minute per square foot of cloth (0.5 cm 3 /sec/cm 2 ) at a pressure drop of 0.5 inch of water (1.27 cm) across the cloth.
Claim 3
Dependent Claim
71 words
The fabric of claim 1 further characterized by a Mullen burst strength of at least 650 psi (4482 kilopascals), a tensile strength of at least 300 lbs. (1334 newtons), a trapezoid tear of at least 40 lbs. (178 newtons), an elongation at break of at least 25%, a weight of not more than 8.25 oz/square yard (280 gm/m 2 ), and a thickness of less than cm 0.016 inch (0.041 cm).
Claim 4
Dependent Claim
15 words
The fabric of claim 1 wherein said cloth is woven in a 1×1 plain weave.
Claim 5
Dependent Claim
15 words
The fabric of claim 3 wherein said cloth is woven in a 2×2 basket weave.
Claim 6
Dependent Claim
22 words
The fabric of claim 1 wherein said cloth is woven about 51-52 ends/inch by about 43-52 picks/inch (20 ends/cm by 17-20 picks/cm).
Claim 7
Dependent Claim
10 words
The fabric of claim 1 wherein said cloth is polyester.
Claim 8
Dependent Claim
18 words
The fabric of claim 1 wherein said cloth is woven of not greater than 600 denier multifilament yarn.
Claim 9
Dependent Claim
15 words
The fabric of claim 7 wherein said cloth is woven of 400-600 denier multifilament yarn.
Claim 10
Dependent Claim
15 words
The fabric of claim 8 wherein said cloth is woven from yarn having 100-300 filaments.
Claim 11
Dependent Claim
14 words
The fabric of claim 9 wherein said cloth is woven from polyester filament yarn.
Claim 12
Dependent Claim
16 words
The fabric of claim 1 wherein said cloth is calendered on both sides without thermal degradation.
Claim 13
Dependent Claim
66 words
A strong, lightweight, thin, flexible fabric of low permeability comprising an uncoated, woven, high strength, lightweight, thin, flexible cloth calendered on both sides without thermal degradation to reduce the permeability to not more than one cubic foot of air per minute per square foot of cloth (0.5 cm 3 /sec/cm 2 ) at a pressure drop of 0.5 inch of water (1.27 cm) across the cloth.
Claim 14
Dependent Claim
66 words
A strong, lightweight, thin, flexible fabric of low permeability comprising an uncoated, woven, high strength, lightweight, thin, flexible cloth calendered on both sides without thermal degradation to reduce the permeability to not more than one cubic foot of air per minute per square foot of cloth (0.5 cm 3 /sec/cm 2 ) at a pressure drop of 0.5 inch of water (1.27 cm) across the cloth.
Claim 15
Dependent Claim
140 words
A strong, lightweight, thin, flexible fabric of low permeability comprising an uncoated woven cloth of polyester calendered on both sides without thermal degradation to reduce the permeability to not more than one cubic foot of air per minute per square foot of cloth (0.5 cm 3 /sec/cm 2 ) at a pressure drop of 0.5 inch of water (1.27 cm) across the cloth, and characterized by a Mullen burst strength of at least 650 psi (4482 kilopascals), a tensile strength of at least 300 lbs. (1334 newtons), a trapezoid tear of at least 40 lbs. (178 newtons), an elongation at break of at least 25%, a weight of not more than 8.25 oz/square yard (280 gm/m 2 ), and a thickness of less than 0.016 inch (0.041 cm), woven of 400-600 denier multifilament yarn, having 100-300 filaments per yarn bundle.
Claim 16
Dependent Claim
140 words
A strong, lightweight, thin, flexible fabric of low permeability comprising an uncoated woven cloth of polyester calendered on both sides without thermal degradation to reduce the permeability to not more than one cubic foot of air per minute per square foot of cloth (0.5 cm 3 /sec/cm 2 ) at a pressure drop of 0.5 inch of water (1.27 cm) across the cloth, and characterized by a Mullen burst strength of at least 650 psi (4482 kilopascals), a tensile strength of at least 300 lbs. (1334 newtons), a trapezoid tear of at least 40 lbs. (178 newtons), an elongation at break of at least 25%, a weight of not more than 8.25 oz/square yard (280 gm/m 2 ), and a thickness of less than 0.016 inch (0.041 cm), woven of 400-600 denier multifilament yarn, having 100-300 filaments per yarn bundle.
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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) | 1993-12-10 | 1994-06-11 | 1994-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-10 | 1998-06-11 | 1998-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-10 | 2002-06-11 | 2002-12-11 | $7700.00 | Window Closed / Lapsed |