US4348458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coiled inorganic monolithic hollow fibers
Assignee: Permea Inc
•
Filing: 1980-09-08
•
Granted: 1982-09-07
•
Expires: 2000-09-08
Abstract
Abstract Essentially inorganic monolithic hollow fibers have at least one segment self-supportingly disposed as a coil. Coil shapes may be spiral, helical or conical helical. Processes are provided for making coiled hollow fibers. Apparatus are provided using coiled hollow fibers.
Inventors
- 👤 Roger S. Otstot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:06
CPC Classifications
B; B01; B01D; B01D69/00; B01D69/08; B01D53/00; B01D53/22; B01D63/00; B01D63/02; B01D63/021; B01D63/0231; B01D63/0232; B01D63/025; B01D67/00; B01D67/0039; B01D67/0041; B01D67/00411; B01D71/00; B01D71/02; B01D71/0215; B01D71/05; B22; B22F; B22F3/00; B22F3/002; C; C04; C04B; C04B35/00; C04B35/622; C04B35/62227; C04B35/62231; C04B35/62236; D; D01; D01D; D01D5/00; D01D5/24; H; H01; H01M; H01M10/00; H01M10/36; H01M10/39; H01M10/3909; H01M10/3918; B01D2313/00; B01D2313/34; B01D2313/345; B22F3/10; B22F3/105; B22F2003/1053; B22F2998/00; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2916; Y10T428/2918; Y10T428/2922; Y10T428/2925; Y10T428/2973; Y10T428/2975; Y10T428/2976
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
29 words
An essentially inorganic brittle monolithic hollow fiber having an anisotropic internal void volume wall structure, wherein the hollow fiber has at least one segment self-supportingly disposed as a coil.
Claim 2
Dependent Claim
29 words
An essentially inorganic brittle monolithic hollow fiber having an anisotropic internal void volume wall structure, wherein the hollow fiber has at least one segment self-supportingly disposed as a coil.
Claim 3
Dependent Claim
36 words
The hollow fiber according to claim 1 which comprises inorganic material selected from the group consisting of brittle metals, brittle metal alloys, metal oxides, metal carbides, metal borides, metal nitrides, semi-metal compounds, ceramics, cermets and metcers.
Claim 4
Dependent Claim
24 words
The hollow fiber according to claim 2 where the hollow fiber has an outer diameter of from about 100 microns to about 10,000 microns.
Claim 5
Dependent Claim
13 words
The hollow fiber according to claim 3 where the coil is substantially spiral.
Claim 6
Dependent Claim
14 words
The hollow fiber according to claim 3 where the coil is substantially conical helical.
Claim 7
Dependent Claim
13 words
The hollow fiber according to claim 3 where the coil is substantially helical.
Claim 8
Dependent Claim
23 words
The hollow fiber according to claim 4, 5 or 6 where the hollow fiber has a substantially circular annular hollow fiber cross section.
Claim 9
Dependent Claim
23 words
The hollow fiber according to claim 4, 5 or 6 where the hollow fiber has a substantially oblong annular hollow fiber cross section.
Claim 10
Dependent Claim
23 words
The hollow fiber according to claim 4, 5 or 6 where the hollow fiber has a substantially lobe-shaped annular hollow fiber cross section.
Claim 11
Dependent Claim
31 words
The hollow fiber according to claim 6 where the coil has a plurality of turns of substantially equal loop diameter and a pitch substantially equal to the hollow fiber outer diameter.
Claim 12
Dependent Claim
17 words
The hollow fiber according to claim 3 having more than one substantially distinct self-supportingly disposed coil-shaped segment.
Claim 13
Dependent Claim
14 words
The hollow fiber according to claim 11 where the coil-shaped segments are substantially helical.
Claim 14
Dependent Claim
18 words
The hollow fiber according to claim 12 where the helical segments are disposed substantially concentric to each other.
Claim 15
Dependent Claim
14 words
The hollow fiber according to claim 11 where the coil-shaped segments are substantially spiral.
Claim 16
Dependent Claim
16 words
The hollow fiber according to claim 14 where the spiral shaped segments are substantially parallelly disposed.
Claim 17
Dependent Claim
15 words
The hollow fiber according to claim 11 where the coil-shaped segments are substantially conical helical.
Claim 18
Dependent Claim
16 words
The hollow fiber according to claim 16 where the conical helical segments are substantially concentrically disposed.
References Cited (Backward Citations)
FR591807A
Cited
US2296321A
Cited
US3505039A
Cited
US3565749A
Cited
GB1452937A
Cited
US4104445A
Cited
US4056373A
Cited
US4105548A
Cited
US4175153A
Cited
US4222977A
Cited
BE882224R
Cited
US4224386A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-06 | 1986-03-08 | 1986-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-06 | 1990-03-08 | 1990-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-06 | 1994-03-08 | 1994-09-07 | $7700.00 | Window Closed / Lapsed |