US6066254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid filter assemblies with integral fluid seals
Assignee: Dow Chemical Co
•
Filing: 1998-01-28
•
Granted: 2000-05-23
•
Expires: 2018-01-28
Abstract
Abstract By making the fluid seal an integral part of either the filter element or the filter housing, the reliability of fluid filter assemblies is improved. In addition, the process for manufacturing filter assemblies and their individual components can be more easily automated.
Inventors
- 👤 Mark D. Huschke
- 👤 Glen W. Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:38
CPC Classifications
B; B01; B01D; B01D65/00; B01D61/00; B01D61/02; B01D61/10; B01D2313/00; B01D2313/04; B01D2313/041; B01D2313/042; B01D2313/44; Y; Y10; Y10S; Y10S425/00; Y10S425/047
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
103 words
An improved fluid filter assembly of (a) a filter element, consisting of a cartridge filter of granular adsorbents or a hollow fiber or spiral wound membrane element, having an outer surface, (b) a housing having an inner surface spaced from the outer surface of the filter element and (c) a seal between the outer surface of the filter element and the inner surface of the housing which directs fluid through the filter element, wherein the improvement comprises the seal being a foamed material incorporated as an integral part of the outer surface of the filter element or the inner surface of the housing.
Claim 2
Dependent Claim
103 words
An improved fluid filter assembly of (a) a filter element, consisting of a cartridge filter of granular adsorbents or a hollow fiber or spiral wound membrane element, having an outer surface, (b) a housing having an inner surface spaced from the outer surface of the filter element and (c) a seal between the outer surface of the filter element and the inner surface of the housing which directs fluid through the filter element, wherein the improvement comprises the seal being a foamed material incorporated as an integral part of the outer surface of the filter element or the inner surface of the housing.
Claim 3
Dependent Claim
18 words
The fluid filter assembly of claim 1 in which the filter element is a spiral wound membrane element.
Claim 4
Dependent Claim
19 words
The fluid filter assembly of claim 1 in which the fluid seal is comprised of a foamed polyurethane material.
Claim 5
Dependent Claim
31 words
The fluid filter assembly of claim 1 in which the fluid seal is an integral part of the outer surface of the filter element and the inner surface of the housing.
Claim 6
Dependent Claim
22 words
The filter element (a) of claim 1 in which the fluid seal is incorporated as an integral part of its outer surface.
Claim 7
Dependent Claim
17 words
The filter element of claim 5 in which the filter element is a spiral wound membrane element.
Claim 8
Dependent Claim
18 words
The filter element of claim 5 in which the fluid seal is comprised of a foamed polyurethane material.
Claim 9
Dependent Claim
23 words
The filter assembly housing (b) of claim 1 in which a fluid seal is incorporated as an integral part of its inner surface.
Claim 10
Dependent Claim
19 words
The filter assembly housing of claim 8 in which the fluid seal is comprised of a foamed polyurethane material.
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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) | 2003-05-23 | 2003-11-22 | 2004-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-05-23 | 2007-11-22 | 2008-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-05-23 | 2011-11-22 | 2012-05-23 | $7700.00 | Window Closed / Lapsed |