US6045600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter cartridge and a method for its manufacture
Assignee: Carl Freudenberg KG
•
Filing: 1998-08-21
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Granted: 2000-04-04
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Expires: 2018-08-21
Abstract
Abstract A filter cartridge has a filter medium, which, on the circumferential side, is surrounded with clearance by a gasket-seal. A frame is arranged in the gap formed by the clearance, and is sealingly bonded to the edges of the filter medium and the gasket-seal.
Inventors
- 👤 Udo Michaelis
- 👤 Jorgen Knudsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:41
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/52; B01D46/521; B01D29/00; B01D29/01; B01D29/012; B01D29/016; B01D46/0001; B01D46/10; B29; B29C; B29C45/00; B29C45/14; B29C45/14336; B29C45/14467; B01D2265/00; B01D2265/04; B01D2271/00; B01D2271/02; B01D2271/027; B29L; B29L2016/00; B29L2031/00; B29L2031/14; Y; Y10; Y10S; Y10S264/00; Y10S264/48; Y10S55/00; Y10S55/31
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
106 words
A filter cartridge, comprising: a filter medium having a circumferential perimeter defining edges; a gasket seal having an edge, the gasket seal circumferentially surrounding the filter medium so that the edges of the gasket seal and the edges of the filter medium face each other; a gap defining a clearance between the gasket seal and the filter medium; a frame located in the gap formed by the clearance, the frame being sealingly bonded to the facing edges of the filter medium and the gasket-seal and having a thickness that is greater than the clearance defined by the gap between the gasket seal and the filter medium.
Claim 2
Dependent Claim
106 words
A filter cartridge, comprising: a filter medium having a circumferential perimeter defining edges; a gasket seal having an edge, the gasket seal circumferentially surrounding the filter medium so that the edges of the gasket seal and the edges of the filter medium face each other; a gap defining a clearance between the gasket seal and the filter medium; a frame located in the gap formed by the clearance, the frame being sealingly bonded to the facing edges of the filter medium and the gasket-seal and having a thickness that is greater than the clearance defined by the gap between the gasket seal and the filter medium.
Claim 3
Dependent Claim
17 words
The filter cartridge as defined by claim 1, wherein the filter medium is an accordion fold pack.
Claim 4
Dependent Claim
24 words
The filter cartridge as defined by claim 1, wherein the gasket-seal is separate form the filter medium and has a closed, continuous ring shape.
Claim 5
Dependent Claim
21 words
The filter cartridge as defined by claim 1, wherein the filter medium and the gasket-seal are made of a non-woven fabric.
Claim 6
Dependent Claim
21 words
The filter cartridge as defined by claim 2, wherein the filter medium and the gasket-seal are made of a non-woven fabric.
Claim 7
Dependent Claim
34 words
The filter cartridge as defined by claim 1, wherein the frame is made of a polymer material and the edges of the gasket seal and the filter medium are sealingly enclosed by the frame.
Claim 8
Dependent Claim
34 words
The filter cartridge as defined by claim 5, wherein the frame is made of a polymer material and the edges of the gasket seal and the filter medium are sealingly enclosed by the frame.
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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) | 2003-04-04 | 2003-10-04 | 2004-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-04-04 | 2007-10-04 | 2008-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-04-04 | 2011-10-04 | 2012-04-04 | $7700.00 | Window Closed / Lapsed |