Patent US5885455A successfully refreshed from Google Patents.
US5885455A
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Filtration unit with pleated filter element
Assignee: Sartorius AG
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Filing: 1997-12-24
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Granted: 1999-03-23
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Expires: 2017-12-24
Abstract
Abstract A fluid filtration unit having pleated filter media with at least one ply, and two housing parts with inlet and outlet fluid passageways and inwardly projecting ribs that accommodate the pleated filter media.
Inventors
- 👤 Andreas Graus
- 👤 Michael Schutzler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:01
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/52; B01D46/521; B01D46/523; B01D29/00; B01D29/01; B01D29/012; B01D29/05; B01D29/07; B01D46/10; B01D63/00; B01D63/16; B01D2265/00; B01D2265/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
84 words
A filtration device comprising: (a) pleated filter media having at least one ply and a multiplicity of pleats, said filter media being disposed and secured between (b) opposing housing components each having a fluid passageway and corresponding projections that accommodate said pleats in said pleated filter media, said housing components having raised and undulated mating surfaces along their peripheries arranged such that when said raised and undulated mating surfaces are matingly engaged, undulated plenums are formed on opposite sides of said pleated filter media.
Claim 2
Dependent Claim
84 words
A filtration device comprising: (a) pleated filter media having at least one ply and a multiplicity of pleats, said filter media being disposed and secured between (b) opposing housing components each having a fluid passageway and corresponding projections that accommodate said pleats in said pleated filter media, said housing components having raised and undulated mating surfaces along their peripheries arranged such that when said raised and undulated mating surfaces are matingly engaged, undulated plenums are formed on opposite sides of said pleated filter media.
Claim 3
Dependent Claim
12 words
The device of claim 1 wherein said corresponding projections are elongate ribs.
Claim 4
Dependent Claim
16 words
The device of claim 2 wherein at least a portion of said corresponding projections are discontinuous.
Claim 5
Dependent Claim
21 words
The device of claim 1 wherein said pleats and said corresponding projections have a cross-sectional shape selected from triangular and trapezoidal.
Claim 6
Dependent Claim
22 words
The device of claim 1 wherein one fluid passageway acts as a fluid inlet and the other acts as a fluid outlet.
Claim 7
Dependent Claim
21 words
The device of claim 1 wherein said filter media is at least two-ply wherein at least one ply comprises microfiber matting.
Claim 8
Dependent Claim
49 words
The device of claim 6 wherein said at least one ply of microfiber matting is oriented in a plane located in a position selected from the inlet side of said pleated filter media, the outlet side of said pleated filter media and both sides of said pleated filter media.
Claim 9
Dependent Claim
35 words
The device of claim 1 wherein said opposing housing components are of polymeric material and are secured to each other by a method selected from the application of a resinous adhesive and by thermal bonding.
Claim 10
Dependent Claim
14 words
The device of claim 7 wherein said filter media extends beyond said corresponding projections.
References Cited (Backward Citations)
US2135863A
Cited
US4177050A
Cited
US4133661A
Cited
US4386948A
Cited
US4455823A
Cited
US4617122A
Cited
US4808203A
Cited
US5505852A
Cited
US5531892A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-03-22 | 2002-09-21 | 2003-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-03-22 | 2006-09-21 | 2007-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-03-22 | 2010-09-21 | 2011-03-23 | $7700.00 | Window Closed / Lapsed |