US4175153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inorganic anisotropic hollow fibers
Assignee: Permea Inc
•
Filing: 1978-05-16
•
Granted: 1979-11-20
•
Expires: 1998-05-16
Abstract
Abstract Essentially inorganic monolithic hollow fibers having a radially anisotropic internal void volume wall structure. Process for the production of such fibers. Apparatus and processes using such fibers.
Inventors
- 👤 Emerick J. Dobo
- 👤 Tommy E. Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:47
CPC Classifications
B; B01; B01D; B01D69/00; B01D69/08; B01D53/00; B01D53/22; B01D67/00; B01D67/0039; B01D67/0041; B01D67/00411; B01D69/087; B01D69/088; B01D71/00; B01D71/02; B01D71/0213; B01D71/022; B01D71/0223; B01D71/02232; B01J; B01J35/00; B01J35/50; B01J35/58; B22; B22D; B22D11/00; B22D11/005; B22F; B22F3/00; B22F3/002; C; C03; C03B; C03B37/00; C03B37/01; C03B37/02; C03B37/022; C03B37/075; C03B37/0756; C04; C04B; C04B20/00; C04B20/0048; C04B20/0056; C04B35/00; C04B35/622; C04B35/62227; C04B35/62231; D; D01; D01D; D01D5/00; D01D5/24; D01F; D01F9/00; D01F9/08; D01F9/10; H; H01; H01M; H01M10/00; H01M10/36; H01M10/39; H01M10/3909; H01M10/3918; H01M4/00; H01M4/86; H01M8/00; B01D2313/00; B01D2313/42; B01D2323/00; B01D2323/219; B01D2323/22; B01D2325/00; B01D2325/02; B01D2325/022; B01D2325/023; B01D2325/027; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02E60/30; Y02E60/50; Y02P; Y02P40/00; Y02P40/50; Y02P40/57; Y02P70/00; Y02P70/50; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2935; Y10T428/294; Y10T428/2973; Y10T428/2975; Y10T428/2978; Y10T428/298
Claims Analysis
Total Claims: 43
Claim 1
Independent Claim
16 words
An essentially inorganic, sintered monolithic hollow fiber having a radially anisotropic internal void volume wall structure.
Claim 2
Dependent Claim
16 words
An essentially inorganic, sintered monolithic hollow fiber having a radially anisotropic internal void volume wall structure.
Claim 3
Dependent Claim
19 words
A fiber according to claim 1 which has an internal void volume of from about 15% to about 95%.
Claim 4
Dependent Claim
19 words
A fiber according to claim 2 which has an internal void volume of from about 45% to about 90%.
Claim 5
Dependent Claim
40 words
A fiber according to claim 2 having an internal void volume in the peripheral external zone of from about 10 to about 35% and an internal void volume in the peripheral internal zone of from about 75 to about 95%.
Claim 6
Dependent Claim
17 words
A fiber according to claim 1 which has an outer diameter of up to about 2000 microns.
Claim 7
Dependent Claim
19 words
A fiber according to claim 5 which has an outer diameter of from about 50 to about 700 microns.
Claim 8
Dependent Claim
19 words
A fiber according to claim 6 which has an outer diameter of from about 100 to about 550 microns.
Claim 9
Dependent Claim
17 words
A fiber according to claim 1, 2, 3, 4, 5, 6 or 7 having a compact layer.
Claim 10
Dependent Claim
20 words
A fiber according to claim 8 wherein the compact layer comprises a skin at the external surface of the fiber.
Claim 11
Dependent Claim
12 words
A fiber according to claim 9 wherein the skin is essentially non-porous.
Claim 12
Dependent Claim
22 words
A fiber according to claim 10 wherein the skin has an effective thickness of less than about 50% of the wall thickness.
Claim 13
Dependent Claim
20 words
A fiber according to claim 8 wherein the compact layer comprises a skin at the internal surface of the fiber.
Claim 14
Dependent Claim
12 words
A fiber according to claim 12 wherein the skin is essentially non-porous.
Claim 15
Dependent Claim
22 words
A fiber according to claim 13 wherein the skin has an effective thickness of less than about 50% of the wall thickness.
Claim 16
Dependent Claim
15 words
A fiber according to claim 8 wherein the compact layer is within the fiber wall.
Claim 17
Dependent Claim
17 words
A fiber according to claim 15 wherein the compact layer within the fiber wall is essentially non-porous.
Claim 18
Dependent Claim
23 words
A fiber according to claim 16 wherein the compact layer has an effective thickness of less than about 50% of the wall thickness.
Claim 19
Dependent Claim
19 words
A fiber according to claim 5 which has a wall thickness of from about 20 to about 300 microns.
Claim 20
Dependent Claim
19 words
A fiber according to claim 18 which has a wall thickness of from about 50 to about 200 microns.
Claim 21
Dependent Claim
22 words
A fiber according to claim 8 wherein the thickness of the compact layer is less than about 50% of the wall thickness.
Claim 22
Dependent Claim
10 words
A fiber according to claim 1 which comprises a metal.
Claim 23
Dependent Claim
19 words
A fiber according to claim 21 which has an internal void volume of from about 15% to about 95%.
Claim 24
Dependent Claim
19 words
A fiber according to claim 22 which has an internal void volume of from about 45% to about 90%.
Claim 25
Dependent Claim
40 words
A fiber according to claim 22 having an internal void volume in the peripheral external zone of from about 10 to about 35% and an internal void volume in the peripheral internal zone of from about 75 to about 95%.
Claim 26
Dependent Claim
17 words
A fiber according to claim 21 which has an outer diameter of up to about 2000 microns.
Claim 27
Dependent Claim
19 words
A fiber according to claim 25 which has an outer diameter of from about 50 to about 700 microns.
Claim 28
Dependent Claim
19 words
A fiber according to claim 26 which has an outer diameter of from about 100 to about 550 microns.
Claim 29
Dependent Claim
17 words
A fiber according to claim 21, 22, 23, 24, 25, 26 or 27 having a compact layer.
Claim 30
Dependent Claim
20 words
A fiber according to claim 28 wherein the compact layer comprises a skin at the external surface of the fiber.
Claim 31
Dependent Claim
12 words
A fiber according to claim 29 wherein the skin is essentially non-porous.
Claim 32
Dependent Claim
22 words
A fiber according to claim 30 wherein the skin has an effective thickness of less than about 50% of the wall thickness.
Claim 33
Dependent Claim
20 words
A fiber according to claim 28 wherein the compact layer comprises a skin at the internal surface of the fiber.
Claim 34
Dependent Claim
12 words
A fiber according to claim 32 wherein the skin is essentially non-porous.
Claim 35
Dependent Claim
22 words
A fiber according to claim 33 wherein the skin has an effective thickness of less than about 50% of the wall thickness.
Claim 36
Dependent Claim
15 words
A fiber according to claim 28 wherein the compact layer is within the fiber wall.
Claim 37
Dependent Claim
17 words
A fiber according to claim 35 wherein the compact layer within the fiber wall is essentially non-porous.
Claim 38
Dependent Claim
24 words
A fiber according to claim 36 wherein the compact layer has an effective thickness of the less than about 50% of the wall thickness.
Claim 39
Dependent Claim
19 words
A fiber according to claim 25 which has a wall thickness of from about 20 to about 300 microns.
Claim 40
Dependent Claim
19 words
A fiber according to claim 38 which has a wall thickness of from about 50 to about 200 microns.
Claim 41
Dependent Claim
21 words
A fiber according to claim 28 wherein the thickness of the compact layer is less than 50% of the wall thickness.
Claim 42
Dependent Claim
15 words
A fiber according to claim 28 wherein the metal is nickel or a nickel alloy.
Claim 43
Dependent Claim
17 words
A fiber according to claim 41 wherein the metal is a nickel alloy comprising nickel and iron.
References Cited (Backward Citations)
US2900708A
Cited
US3001871A
Cited
US2911057A
Cited
US3022187A
Cited
US2961062A
Cited
US3052967A
Cited
US3226263A
Cited
US3111396A
Cited
US3228797A
Cited
US3303055A
Cited
US3246764A
Cited
US3238700A
Cited
US3241298A
Cited
US3311689A
Cited
US3351487A
Cited
US3287112A
Cited
US3509694A
Cited
US3385915A
Cited
US3981749A
Cited
US3406025A
Cited
US3498909A
Cited
US3565749A
Cited
US3529044A
Cited
US3567810A
Cited
US3713865A
Cited
US3639953A
Cited
US3695869A
Cited
US3846527A
Cited
US3671228A
Cited
US3652749A
Cited
US3897221A
Cited
US3724672A
Cited
US3725186A
Cited
US3697262A
Cited
US3907954A
Cited
US3745202A
Cited
US3950478A
Cited
US3947534A
Cited
US4053662A
Cited
US3975478A
Cited
US3973234A
Cited
US4105548A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-19 | 1983-05-21 | 1983-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-19 | 1987-05-21 | 1987-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-19 | 1991-05-21 | 1991-11-20 | $7700.00 | Window Closed / Lapsed |