Patent US5028465A successfully refreshed from Google Patents.
US5028465A
Expired / Lapsed
US
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Hydroentangled composite filter element
Assignee: Custom Papers Group Inc
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Filing: 1989-03-20
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Granted: 1991-07-02
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Expires: 2009-03-20
Abstract
Abstract A high performance filter element is provided, which filter element comprises a wound sheet of apertured material formed by hydroentangling webs of disparate fibrous materials. In a most preferred embodiment, the fibrous material disposed upstream of fluid flow should have a fiber diameter smaller than that disposed downstream.
Inventors
- 👤 Homan B. Kinsley, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:24
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; B01D39/18; B01D39/20; B01D39/2003; B01D39/2017; D; D04; D04H; D04H1/00; D04H1/40; D04H1/44; D04H1/46; D04H1/492; D04H1/495; B01D2239/00; B01D2239/06; B01D2239/0604; B01D2239/0622; B01D2239/065; B01D2239/0663; B01D2239/069; B01D2239/0695; B01D2239/12; B01D2239/1233; Y; Y10; Y10S; Y10S428/00; Y10S428/906; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1362; Y10T428/1369; Y10T428/1372; Y10T428/1386; Y10T428/139; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24942
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
40 words
A high performance filter element, comprising a helically wound sheet of apertured material formed by hydroentangling superposed webs of disparate fibrous materials, one of said superposed webs having a fiber diameter substantially smaller than that of a contiguous superposed web.
Claim 2
Dependent Claim
40 words
A high performance filter element, comprising a helically wound sheet of apertured material formed by hydroentangling superposed webs of disparate fibrous materials, one of said superposed webs having a fiber diameter substantially smaller than that of a contiguous superposed web.
Claim 3
Dependent Claim
56 words
A filter assembly comprising a filter element according to claim 1, said assembly being adapted to filter a fluid travelling in a given direction relative to the axis of said filter element, said filter element being oriented within said assembly such that said web having a smaller fiber diameter is disposed upstream of said contiguous web.
Claim 4
Dependent Claim
18 words
A filter assembly according to claim 2, wherein said given direction is radially inwardly of said filter element.
Claim 5
Dependent Claim
18 words
A filter assembly according to claim 2, wherein said given direction is radially outwardly of said filter element.
Claim 6
Dependent Claim
16 words
A filter element according to claim 1, comprising a total of two of said superposed webs.
Claim 7
Dependent Claim
34 words
A filter element according to claim 5, wherein said web having a smaller fiber diameter is formed from a polymeric material and said web having a larger fiber diameter is formed from cellulosic fibers.
Claim 8
Dependent Claim
21 words
A filter element according to claim 6, wherein said web having a smaller fiber diameter is formed from melt blown polyester.
Claim 9
Dependent Claim
21 words
A filter element according to claim 6, wherein said web having a smaller fiber diameter is formed from melt blown polypropylene.
Claim 10
Dependent Claim
23 words
A filter element according to claim 1, wherein said web having a smaller fiber diameter is formed from melt blown polyester or polypropylene.
Claim 11
Dependent Claim
21 words
A filter element according to claim 1, wherein said web having a smaller fiber diameter is formed from a microfiber material.
Claim 12
Dependent Claim
45 words
A filter element according to claim 1, wherein said web having a smaller fiber diameter is formed from fibers having a diameter ranging from submicron to 5 micrometers, and said contiguous web is formed from fibers having a diameter ranging from 5 to 50 micrometers.
Claim 13
Dependent Claim
45 words
A filter element according to claim 2, wherein said web having a smaller fiber diameter is formed from fibers having a diameter ranging from submicron to 5 micrometers, and said contiguous web is formed from fibers having a diameter ranging from 5 to 50 micrometers.
Claim 14
Dependent Claim
40 words
A filter element according to claim 6, wherein said polymeric material web is formed from fibers having a diameter of submicron to 5 micrometers and said cellulosic web is formed from fibers having a diameter of 5 to 50 micrometers.
Claim 15
Dependent Claim
43 words
A filter element according to claim 2, comprising a total of two of said superposed webs, wherein said web having a smaller fiber diameter is formed from a polymeric material and said web having a larger fiber diameter is formed from cellulosic fibers.
Claim 16
Dependent Claim
45 words
A filter element according to claim 14, wherein said web having a smaller fiber diameter is formed from fibers having a diameter ranging from submicron to 5 micrometers, and said contiguous web is formed from fibers having a diameter ranging from 5 to 50 micrometers.
Claim 17
Dependent Claim
45 words
A filter element according to claim 2, comprising a total of two superposed webs, wherein said web having a smaller fiber diameter is formed from melt blown polyester or melt blown polypropylene, and said web having a larger fiber diameter is formed from cellulosic fibers.
Claim 18
Dependent Claim
45 words
A filter element according to claim 16, wherein said web having a smaller fiber diameter is formed from fibers having a diameter ranging from submicron to 5 micrometers, and said contiguous web is formed from fibers having a diameter ranging from 5 to 50 micrometers.
Claim 19
Dependent Claim
27 words
A filter element according to claim 1, wherein said superposed webs are hydroentangled on a screen having a linear mesh ranging from 5 to 40×10 to 50.
Claim 20
Dependent Claim
21 words
A filter element according to claim 1, wherein said helically wound sheet is wound a total of at least three revolutions.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-01 | 1994-12-31 | 1995-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-01 | 1998-12-31 | 1999-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-01 | 2002-12-31 | 2003-07-02 | $7700.00 | Window Closed / Lapsed |