US4654265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous hollow fiber
Assignee: Ube Corp
•
Filing: 1986-06-04
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Granted: 1987-03-31
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Expires: 2006-06-04
Abstract
Abstract In a porous hollow fiber having a large number of micropores in its surrounding wall, the improvement in which walls of said pores are coated with ethylene oxide-grafted nylon, such as ethylene oxide-grafted nylon 6.
Inventors
- 👤 Eiichi Kamei
- 👤 Yasushi Shimomura
- 👤 Mitsuo Yamanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:15
CPC Classifications
B; B01; B01D; B01D67/00; B01D67/0081; B01D67/0088; B01D69/00; B01D69/08; D; D01; D01D; D01D5/00; D01D5/24; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2935; Y10T428/2973; Y10T428/2975; Y10T428/2978
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
29 words
In a porous hollow fiber having a large number of micropores in its surrounding wall, the improvement in which walls of said pores are coated with ethylene oxide-grafted nylon.
Claim 2
Dependent Claim
29 words
In a porous hollow fiber having a large number of micropores in its surrounding wall, the improvement in which walls of said pores are coated with ethylene oxide-grafted nylon.
Claim 3
Dependent Claim
25 words
The porous hollow fiber as claimed in claim 1, wherein outer and inner surfaces of the surrounding wall are further coated with ethylene oxide-grafted nylon.
Claim 4
Dependent Claim
32 words
The porous hollow fiber as claimed in claim 1, wherein at least one of outer and inner surfaces of the surrounding wall is coated with a non-porous layer of ethylene oxide-grafted nylon.
Claim 5
Dependent Claim
23 words
The porous hollow fiber as claimed in claim 1, wherein said micropores in the surrounding wall are filled up with ethylene oxide-grafted nylon.
Claim 6
Dependent Claim
33 words
The porous hollow fiber as claimed in claim 1, wherein said ethylene oxide-grafted nylon contains at least one nylon component selected from the group consisting of nylon 6, nylon 66 and nylon 12.
Claim 7
Dependent Claim
41 words
The porous hollow fiber as claimed in claim 1, wherein said ethylene oxide-grafted nylon has a graft ratio in the range of 1 to 10, said graft ratio being expressed by molar amount of ethylene oxide per 1 mol. of nylon.
Claim 8
Dependent Claim
41 words
The porous hollow fiber as claimed in claim 1, wherein said ethylene oxide-grafted nylon has a graft ratio in the range of 3 to 6, said graft ratio being expressed by molar amount of ethylene oxide per 1 mol. of nylon.
References Cited (Backward Citations)
US3320088A
Cited
US4001367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-30 | 1990-09-29 | 1991-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-30 | 1994-09-29 | 1995-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-30 | 1998-09-29 | 1999-03-31 | $7700.00 | Window Closed / Lapsed |