US4663222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-woven fabric, and oil water separating filter and oil-water separating method
Assignee: Asahi Kasei Corp
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Filing: 1986-01-24
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Granted: 1987-05-05
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Expires: 2006-01-24
Abstract
Abstract Disclosed is a water-repellent nonwoven fabric made of a melt-blown fiber having a single filament denier of 0.005 to 2.0, wherein the fiber packing ratio is 5 to 70% and the water pressure resistance index is 400 to 2,000 mmH 2 O. The nonwoven fabric is used for an oil-water separating filter having a permeability to oil and non-permeability to water. A composite fabric comprising a combination of the nonwoven fabric and an air-permeable knitted or woven fabric laminated and integrated with at least one surface of the nonwoven fabric is useful as an air permeable and water repellent fabric.
Inventors
- 👤 Kazuto Ohue
- 👤 Toshiyuki Kondou
- 👤 Hisaharu Takeuchi
- 👤 Yuzo Ikeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:56
CPC Classifications
A; A41; A41D; A41D31/00; A41D31/04; A41D31/10; A41D31/102; B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/045; B01D17/08; B01D17/10; B01D39/00; B01D39/08; B01D39/083; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; B32; B32B; B32B5/00; B32B5/02; B32B5/022; B32B5/22; B32B5/24; B32B5/26; B32B7/00; B32B7/02; D; D04; D04H; D04H1/00; D04H1/40; D04H1/54; D04H1/56; D04H3/00; D04H3/08; D04H3/16; B01D2239/00; B01D2239/04; B01D2239/0407; B01D2239/0414; B01D2239/0428; B01D2239/0471; B01D2239/0478; B01D2239/06; B01D2239/0604; B01D2239/0622; B01D2239/065; B01D2239/0659; B01D2239/0668; B01D2239/0672; B01D2239/0686; B01D2239/12; B01D2239/1233; B01D2239/1258; B32B2307/00; B32B2307/70; B32B2307/726; B32B2307/7265; Y; Y10; Y10S; Y10S210/00; Y10S210/05; Y10S428/00; Y10S428/903; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24826; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/159; Y10T442/30; Y10T442/3707; Y10T442/40; Y10T442/494; Y10T442/60; Y10T442/654; Y10T442/68
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
39 words
A water-repellent nonwoven fabric comprising a melt-blown fiber having a single filament denier of 0.005 to 2.0, wherein the fiber packing ratio is 5 to 70% and the water pressure resistance index is 400 to 2,000 mmH 2 O.
Claim 2
Dependent Claim
39 words
A water-repellent nonwoven fabric comprising a melt-blown fiber having a single filament denier of 0.005 to 2.0, wherein the fiber packing ratio is 5 to 70% and the water pressure resistance index is 400 to 2,000 mmH 2 O.
Claim 3
Dependent Claim
21 words
A water-repellent nonwoven fabric according to claim 1, wherein the melt-blown fiber has a single filament denier of 0.005 to 1.0.
Claim 4
Dependent Claim
21 words
A water-repellent nonwoven fabric according to claim 1 wherein the melt-blown fiber has a single filament denier of 0.01 to 0.5.
Claim 5
Dependent Claim
32 words
A water-repellent nonwoven fabric according to claim 1 wherein the nonwoven fabric has a fiber packing ratio of 5 to 30% and an air permeability of at least 1.0 cc/cm 2 .sec
Claim 6
Dependent Claim
21 words
A water-repellent nonwoven fabric according to claim 1 wherein the nonwoven fabric has a fiber packing ratio of 10 to 50%.
Claim 7
Dependent Claim
21 words
A water-repellent nonwoven fabric according to claim 1 wherein the nonwoven fabric has a fiber packing ratio of 15 to 40%.
Claim 8
Dependent Claim
58 words
An oil-water separating filter having a permeability to oil and a non-permeability to water, which comprises a nonwoven fabric made of a melt-blown fiber having a single filament denier of 0.005 to 2.0, said nonwoven fabric having a fiber packing ratio of 5 to 70% and a water pressure resistance index of 400 to 2,000 mmH 2 O.
Claim 9
Dependent Claim
58 words
An oil-water separating filter having a permeability to oil and a non-permeability to water, which comprises a nonwoven fabric made of a melt-blown fiber having a single filament denier of 0.005 to 2.0, said nonwoven fabric having a fiber packing ratio of 5 to 70% and a water pressure resistance index of 400 to 2,000 mmH 2 O.
Claim 10
Dependent Claim
21 words
An oil-water separating filter according to claim 7 wherein said nonwoven fabric has a fiber packing ratio of 10 to 50%.
Claim 11
Dependent Claim
21 words
An oil-water separating filter according to claim 7 wherein said nonwoven fabric has a fiber packing ratio of 15 to 40%.
Claim 12
Dependent Claim
26 words
An oil-water separating filter according to claim 7 which further comprises a liquid-permeable sheet which is laminated on at least one surface of the nonwoven fabric.
Claim 13
Dependent Claim
27 words
An oil-water separating filter according to claim 10 wherein the liquid-permeable sheet is a mesh structure of a metal or a woven fabric of a synthetic fiber.
Claim 14
Dependent Claim
71 words
A composite fabric comprising a water-repellent nonwoven fabric and an air-permeable knitted or woven fabric laminated and integrated with at least one surface of said nonwoven fabric, said nonwoven fabric being made of a melt-blown fiber having a single filament denier of 0.005 to 2.0 and said nonwoven fabric having a fiber packing ratio of 5 to 70% and a water pressure resistance index of 400 to 2,000 mmH 2 O.
Claim 15
Dependent Claim
71 words
A composite fabric comprising a water-repellent nonwoven fabric and an air-permeable knitted or woven fabric laminated and integrated with at least one surface of said nonwoven fabric, said nonwoven fabric being made of a melt-blown fiber having a single filament denier of 0.005 to 2.0 and said nonwoven fabric having a fiber packing ratio of 5 to 70% and a water pressure resistance index of 400 to 2,000 mmH 2 O.
Claim 16
Dependent Claim
20 words
A composite fabric according to claim 12 wherein the melt-blown fiber has a single filament denier of 0.005 to 1.0.
Claim 17
Dependent Claim
31 words
A composite fabric according to claim 12 wherein the nonwoven fabric has a fiber packing ratio of 5 to 30% and an air permeability of at least 1.0 cc/cm 2 .sec.
Claim 18
Dependent Claim
58 words
A composite fabric according to claim 12 wherein the air-permeable knitted or woven fabric exhibits a stress of at least the value A defined by the following equation, when said knitted or woven fabric is elongated at the elongation at break of the nonwoven fabric: A=(2.0 kg/2.5 cm)--(the maximum stress value attained when the nonwoven fabric is elongated).
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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) | 1990-05-04 | 1990-11-03 | 1991-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-04 | 1994-11-03 | 1995-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-04 | 1998-11-03 | 1999-05-05 | $7700.00 | Window Closed / Lapsed |