US3762564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter and method of manufacture
Assignee: Honeywell International Inc
•
Filing: 1972-05-11
•
Granted: 1973-10-02
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Expires: 1992-05-11
Abstract
Abstract Filters for petroleum based liquids and the like are manufactured from heat-treated fabric composed of multicomponent fibers. In general the filter is characterized by light weight, corrosion resistance, compatibility with petroleum based liquids, low cost, dimensional stability and resistance to shock and other mechanical abuse.
Inventors
- 👤 G Weedon
- 👤 G Collingwood
- 👤 R Wincklhofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:10
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/08; B01D39/083; B01D29/00; B01D29/11; B01D29/111; B01D29/31; B01D29/33; B01D29/50; B01D29/56; B01D29/58; B01D35/00; B01D35/02; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; B01D2201/00; B01D2201/02; B01D2239/00; B01D2239/02; B01D2239/0216; B01D2239/0225; B01D2239/0233; B01D2239/0241; B01D2239/04; B01D2239/0407; B01D2239/12; B01D2239/1291
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
27 words
An article as defined in claim 1 wherein said different polymeric materials are selected from the group consisting of polyolefins, polyamides, polyesters, polysulfones, polyphenylene oxides and polycarbonates.
Claim 2
Dependent Claim
16 words
An article as defined in claim 2 wherein said fibrous material is comprised of co-extruded fibers.
Claim 3
Dependent Claim
26 words
An article as defined in claim 3 wherein said polymeric materials are extruded in a sheath-core relationship, the sheath component being of said lower melting material.
Claim 4
Dependent Claim
22 words
An article as defined in claim 2 wherein one pOlymeric material is a polyamide and the other polymeric material is a polyester.
Claim 5
Dependent Claim
29 words
The filter of claim 1 wherein said fibrous structure is comprised of matrix filaments which are composed of a polycaproamide matrix and polyethylene terephthalate fibrils disposed in said matrix.
Claim 6
Dependent Claim
36 words
The filter of claim 1 wherein said porous layer is surrounded by a flange with a substantial portion of said layer inside said flange lying in a different plane from said flange such as a cone.
Claim 7
Dependent Claim
13 words
A filter of claim 7 mounted in a conduit for conveying petroleum products.
Claim 8
Independent Claim
78 words
The method of making a filter by: taking multicomponent fibers consisting of a first polymer having a melting point at least 10* C. lower than a second polymer, fabricating said filaments into a porous textile material, and forming said textile material into a filter by self-bonding said filaments to one another at their points of intersection by heating to a temperature above the fusion point of said first polymer and below the fusion point of said second polymer.
Claim 9
Dependent Claim
38 words
The process of claim 9 wherein a multiplicity of fibers are plied into a yarn which is then used for fabricating into a porous textile material, the diameter of said yarn being materially reduced by said heating step.
Claim 10
Dependent Claim
19 words
The process of claim 9 wherein the heating step is carried out between about 230* C. and 250* C.
Claim 11
Dependent Claim
31 words
The process of claim 11 wherein said forming step includes clamping a layer of said textile material about a periphery and pressing that portion inside the periphery into a three-dimensional shape.
Claim 12
Dependent Claim
31 words
The process of claim 12 wherein the textile material is free to retract thereby the interstices of said material are reduced from shrinkage of said material to form a microporous structure.
References Cited (Backward Citations)
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Cited
FR1310150A
Cited
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US3038235A
Cited
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Cited
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Cited
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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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |