US5614095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtration mediam support material and filter comprising same
Assignee: Pall Corp
•
Filing: 1995-05-30
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Granted: 1997-03-25
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Expires: 2015-05-30
Abstract
Abstract The present invention provides a method of preparing a support for a filtration medium comprising passing a sheet of nonwoven fibrous polymeric material having first and second sides through a calender which comprises a nondeformable roll and a resilient roll, the nondeformable roll being maintained at a temperature below the melting temperature of the material, so as to increase the smoothness of the first side of the material which contacted the resilient roll. A filtration medium support material prepared in accordance with the method of the present invention, as well as a filter comprising a filtration medium and that filtration medium support material, are also provided by the present invention.
Inventors
- 👤 Peter J. Degen
- 👤 Colin F. Harwood
- 👤 John B. Ronan
- 👤 Jason Mei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:53
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/54; B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/08; B01D69/00; B01D69/10; B01D69/107; B01D69/1071; B01D2239/00; B01D2239/06; B01D2239/065; B01D2239/0654; B01D2239/10; B01D2239/12; B01D2239/1233; Y; Y10; Y10S; Y10S264/00; Y10S264/48
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
40 words
A filtration medium support material comprising a sheet of nonwoven fibrous polymeric material having first and second sides, said nonwoven fibrous polymeric material having a sliding force against itself of no more than about 15 ounces on both sides thereof.
Claim 2
Dependent Claim
40 words
A filtration medium support material comprising a sheet of nonwoven fibrous polymeric material having first and second sides, said nonwoven fibrous polymeric material having a sliding force against itself of no more than about 15 ounces on both sides thereof.
Claim 3
Dependent Claim
26 words
The filtration medium support material of claim 1, wherein the fibers which comprise said nonwoven fibrous polymeric material are at least about 10 microns in diameter.
Claim 4
Dependent Claim
28 words
The filtration medium support material of claim 3, wherein the fibers which comprise said nonwoven fibrous polymeric material range from about 15 to about 50 microns in diameter.
Claim 5
Dependent Claim
20 words
The filtration medium support material of claim 3, wherein the fibers which comprise said nonwoven fibrous polymeric material are polypropylene.
Claim 6
Dependent Claim
31 words
The filtration medium support material of claim 4, wherein said nonwoven fibrous polymeric material has a sliding force against itself of no more than about 12 ounces on both sides thereof.
Claim 7
Dependent Claim
15 words
A filter comprising a filtration medium and the filtration medium support material of claim 5.
Claim 8
Dependent Claim
21 words
The filtration medium support material of claim 3, wherein the fibers which comprise said nonwoven fibrous polymeric material are polyvinylidene fluoride.
Claim 9
Dependent Claim
31 words
The filtration medium support material of claim 7, wherein said nonwoven fibrous polymeric material has a sliding force against itself of no more than about 12 ounces on both sides thereof.
Claim 10
Dependent Claim
15 words
A filter comprising a filtration medium and the filtration medium support material of claim 8.
Claim 11
Dependent Claim
31 words
The filtration medium support material of claim 1, wherein said nonwoven fibrous polymeric material has a sliding force against itself of no more than about 12 ounces on both sides thereof.
Claim 12
Dependent Claim
15 words
A filter comprising a filtration medium and the filtration medium support material of claim 10.
Claim 13
Dependent Claim
33 words
The filtration medium support material of claim 1, wherein the fibers which comprise said nonwoven fibrous polymeric material are selected from the group consisting of polyamides, polyesters, polyolefins, aramides, fluoropolymers, and mixtures thereof.
Claim 14
Dependent Claim
29 words
The filtration medium support material of claim 12, wherein the fibers which comprise said nonwoven fibrous polymeric material are selected from the group consisting of polypropylene and polyvinylidene fluoride.
Claim 15
Dependent Claim
15 words
A filter comprising a filtration medium and the filtration medium support material of claim 1.
Claim 16
Dependent Claim
58 words
A filter comprising a filtration medium and a filtration medium support material mated thereto, wherein said filtration medium support material comprises a sheet of nonwoven fibrous polymeric material having first and second sides and having a sliding force against itself of no more than about 15 ounces on at least one side thereof which contacts said filtration medium.
Claim 17
Dependent Claim
58 words
A filter comprising a filtration medium and a filtration medium support material mated thereto, wherein said filtration medium support material comprises a sheet of nonwoven fibrous polymeric material having first and second sides and having a sliding force against itself of no more than about 15 ounces on at least one side thereof which contacts said filtration medium.
Claim 18
Dependent Claim
23 words
The filter of claim 15, wherein the fibers which comprise said nonwoven fibrous polymeric material are at least about 10 microns in diameter.
Claim 19
Dependent Claim
25 words
The filter of claim 16, wherein the fibers which comprise said nonwoven fibrous polymeric material range from about 15 to about 50 microns in diameter.
Claim 20
Dependent Claim
17 words
The filter of claim 17, wherein the fibers which comprise said nonwoven fibrous polymeric material are polypropylene.
Claim 21
Dependent Claim
28 words
The filter of claim 18, wherein said nonwoven fibrous polymeric material has a sliding force against itself of no more than about 12 ounces on both sides thereof.
Claim 22
Dependent Claim
12 words
The filter of claim 18, wherein said filtration medium is a membrane.
Claim 23
Dependent Claim
18 words
The filter of claim 17, wherein the fibers which comprise said nonwoven fibrous polymeric material are polyvinylidene fluoride.
Claim 24
Dependent Claim
28 words
The filter of claim 21, wherein said nonwoven fibrous polymeric material has a sliding force against itself of no more than about 12 ounces on both sides thereof.
Claim 25
Dependent Claim
12 words
The filter of claim 21, wherein said filtration medium is a membrane.
Claim 26
Dependent Claim
12 words
The filter of claim 17, wherein said filtration medium is a membrane.
Claim 27
Dependent Claim
12 words
The filter of claim 16, wherein said filtration medium is a membrane.
Claim 28
Dependent Claim
30 words
The filter of claim 15, wherein the fibers which comprise said nonwoven fibrous polymeric material are selected from the group consisting of polyamides, polyesters, polyolefins, aramides, fluoropolymers, and mixtures thereof.
Claim 29
Dependent Claim
26 words
The filter of claim 26, wherein the fibers which comprise said nonwoven fibrous polymeric material are selected from the group consisting of polypropylene and polyvinylidene fuoride.
Claim 30
Dependent Claim
12 words
The filter of claim 27, wherein said filtration medium is a membrane.
Claim 31
Dependent Claim
12 words
The filter of claim 26, wherein said filtration medium is a membrane.
Claim 32
Dependent Claim
28 words
The filter of claim 15, wherein said nonwoven fibrous polymeric material has a sliding force against itself of no more than about 15 ounces on both sides thereof.
Claim 33
Dependent Claim
28 words
The filter of claim 30, wherein said nonwoven fibrous polymeric material has a sliding force against itself of no more than about 12 ounces on both sides thereof.
Claim 34
Dependent Claim
35 words
The filter of claim 15, wherein said nonwoven fibrous polymeric material has a sliding force against itself of no more than about 12 ounces on at least one side thereof which contacts said filtration medium.
Claim 35
Dependent Claim
12 words
The filter of claim 32, wherein said filtration medium is a membrane.
Claim 36
Dependent Claim
12 words
The filter of claim 15, wherein said filtration medium is a membrane.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2000-03-24 | 2000-09-23 | 2001-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-03-24 | 2004-09-23 | 2005-03-25 | $3760.00 | Window Closed / Lapsed |
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