US5445771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing hollow fiber separatory devices
Assignee: Pall Corp
•
Filing: 1993-07-19
•
Granted: 1995-08-29
•
Expires: 2013-07-19
Abstract
Abstract A hollow fiber separatory device or module is produced by injection molding a thermoplastic potting material around thermoplastic hollow fibers. The thermoplastic hollow fibers are enhanced in order to increase the fibers' ability to withstand the high temperatures inherent in injection molding techniques. Also disclosed is a process for preparing two or more hollow fiber modules whereby the fibers are potted in an hourglass configuration.
Inventors
- 👤 Peter J. Degen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:05
CPC Classifications
B; B01; B01D; B01D67/00; B01D67/0081; B01D67/009; B01D63/00; B01D63/02; B01D63/021; B01D63/022; B01D63/0221; B01D63/0233; Y; Y02; Y02A; Y02A20/00; Y02A20/124; Y02A20/131
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
118 words
A process for preparing a hollow fiber separatory device comprising: configuring thermoplastic hollow fibers into a multi-noded configuration having no more than two nodes, each node defining a loop; embedding a portion of the two-loop configuration into a potting compound that softens and melts when exposed to heat, including injection molding the potting compound among the fibers in a portion of the two-loop configuration between the two nodes and forming a single potted section such that one loop extends from each of two different faces of the potted section; cooling the potting compound such that the fibers are secured and sealed in the potting compound; and cutting the embedded fibers of the two-loop configuration to form two modules.
Claim 2
Dependent Claim
118 words
A process for preparing a hollow fiber separatory device comprising: configuring thermoplastic hollow fibers into a multi-noded configuration having no more than two nodes, each node defining a loop; embedding a portion of the two-loop configuration into a potting compound that softens and melts when exposed to heat, including injection molding the potting compound among the fibers in a portion of the two-loop configuration between the two nodes and forming a single potted section such that one loop extends from each of two different faces of the potted section; cooling the potting compound such that the fibers are secured and sealed in the potting compound; and cutting the embedded fibers of the two-loop configuration to form two modules.
Claim 3
Dependent Claim
23 words
The process of claim 1 further comprising irradiating the hollow fibers to cross-link the fibers prior to embedding them into the potting compound.
Claim 4
Dependent Claim
18 words
The process of claim 2 wherein irradiating the fibers comprises irradiating them with cobalt-60 or cesium-137 gamma radiation.
Claim 5
Dependent Claim
22 words
The method of claim 2 wherein irradiating the fibers comprises irradiating them with from about 5 to about 25 Mrad of radiation.
Claim 6
Dependent Claim
15 words
The process of claim 1 wherein configuring the hollow fibers comprises forming an hourglass configuration.
Claim 7
Dependent Claim
17 words
The process of claim 1 wherein the thermoplastic hollow fibers comprise polyethylene, polyvinylidene difluoride, or polytetrafluoroethylene fibers.
Claim 8
Dependent Claim
25 words
The process of claim 1 wherein cutting the embedded fibers comprises cutting the fibers in the potted section along transverse longitudinal axes of the fibers.
Claim 9
Dependent Claim
15 words
The process of claim 1 wherein cutting the embedded fibers includes simultaneously forming two modules.
Claim 10
Dependent Claim
36 words
The process of claim 8 wherein configuring the hollow fibers comprises forming an hourglass configuration and wherein cutting the embedded fibers comprises cutting the fibers in the potted sections along transverse longitudinal axes of the fibers.
Claim 11
Dependent Claim
41 words
The process of claim 9 wherein the thermoplastic hollow fibers comprise polyethylene, polyvinylidene difluoride, or polytetrafluoroethylene fibers and wherein irradiating the fibers comprises irradiating them with from about 5 to about 25 Mrad of radiation using cobalt-60 or cesium-137 gamma radiation.
Claim 12
Dependent Claim
117 words
A process for preparing a hollow fiber separatory device comprising: configuring thermoplastic hollow fibers into a multi-noded configuration having more than two nodes, each node defining a loop; embedding portions of the multi-loop configuration into a potting compound that softens and melts when exposed to heat, including injection molding the potting compound among the fibers in portions of the multi-loop configuration between the nodes and forming a plurality of potted sections such that no more than one loop extends from each potted section; cooling the potting compound such that the fibers are secured and sealed in the potting compound; and cutting the embedded fibers in each potted section to form a single module from each potted section.
Claim 13
Dependent Claim
117 words
A process for preparing a hollow fiber separatory device comprising: configuring thermoplastic hollow fibers into a multi-noded configuration having more than two nodes, each node defining a loop; embedding portions of the multi-loop configuration into a potting compound that softens and melts when exposed to heat, including injection molding the potting compound among the fibers in portions of the multi-loop configuration between the nodes and forming a plurality of potted sections such that no more than one loop extends from each potted section; cooling the potting compound such that the fibers are secured and sealed in the potting compound; and cutting the embedded fibers in each potted section to form a single module from each potted section.
Claim 14
Dependent Claim
23 words
The process of claim 11 further comprising irradiating the hollow fibers to cross-link the fibers prior to embedding them into the potting compound.
Claim 15
Dependent Claim
18 words
The process of claim 12 wherein irradiating the fibers comprises irradiating them with cobalt-60 or cesium-137 gamma radiation.
Claim 16
Dependent Claim
22 words
The method of claim 12 wherein irradiating the fibers comprises irradiating them with from about 5 to about 25 Mrad of radiation.
Claim 17
Dependent Claim
25 words
The process of claim 12 wherein cutting the embedded fibers comprises cutting the fibers in the potted sections along transverse longitudinal axes of the fibers.
Claim 18
Dependent Claim
41 words
The process of claim 15 wherein the thermoplastic hollow fibers comprise polyethylene, polyvinylidene difluoride, or polytetrafluoroethylene fibers and wherein irradiating the fibers comprises irradiating them with from about 5 to about 25 Mrad of radiation using cobalt-60 or cesium-137 gamma radiation.
Claim 19
Dependent Claim
17 words
The process of claim 16 wherein cutting the embedded fibers comprises simultaneously forming a plurality of modules.
Claim 20
Dependent Claim
17 words
The process of claim 11 wherein cutting the embedded fibers comprises simultaneously forming a plurality of modules.
Claim 21
Dependent Claim
17 words
The process of claim 11 wherein the thermoplastic hollow fibers comprise polyethylene, polyvinylidene difluoride, or polytetrafluoroethylene fibers.
Claim 22
Dependent Claim
23 words
The process of claim 11 wherein cutting comprises cutting the embedded fibers in the potted sections along transverse longitudinal axes of the fibers.
References Cited (Backward Citations)
US3198335A
Cited
US3262808A
Cited
US3524546A
Cited
US3697351A
Cited
US3728425A
Cited
GB1338810A
Cited
US4014798A
Cited
US3882024A
Cited
US4130689A
Cited
US4231871A
Cited
US4269712A
Cited
US4276249A
Cited
US4405536A
Cited
US4323453A
Cited
US4772390A
Cited
US4808378A
Cited
US4980060A
Cited
EP0302650A1
Cited
US4885086A
Cited
US4902416A
Cited
US4865735A
Cited
US4800019A
Cited
DE3839966A1
Cited
US5032269A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-08-28 | 1999-02-27 | 1999-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-08-28 | 2003-02-27 | 2003-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-08-28 | 2007-02-27 | 2007-08-29 | $7700.00 | Window Closed / Lapsed |