US3753500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integral in-line filter
Assignee: 3M Co
•
Filing: 1970-03-20
•
Granted: 1973-08-21
•
Expires: 1990-03-20
Abstract
Abstract An integral, composite filtration structure is formed in situ of thermosetting resin-coated particles bonded to each other and to the inner walls of a tubular article at the contiguous surface of said article and the resin-coated particles.
Inventors
- 👤 D Voegeli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:07
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/02; B01D39/00; B01D39/14; B01D39/20; B01D39/2003; B01D39/2006; B01D39/2013; Y; Y10; Y10S; Y10S55/00; Y10S55/05
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
13 words
The filter of claim 1 wherein said body comprises thermoset resin-coated glass beads.
Claim 2
Dependent Claim
26 words
The filter of claim 2, wherein said body is a laminated structure comprising two or more layers of thermoset resin-coated glass beads having different micronic ratings.
Claim 3
Dependent Claim
15 words
The filter of claim 2, wherein said body comprises a shaped, extended surface area filter.
Claim 4
Dependent Claim
13 words
The filter of claim 2, wherein said resin is a thermosetting epoxy resin.
Claim 5
Independent Claim
107 words
A method for forming an integral in-line filter comprising inserting in a filter housing a dam conforming to the internal dimensions of said housing, charging a desired amount of thermosetting resin coated particles into the open end of said filter housing, inserting a ram into the open end of said filter housing and applying pressure to consolidate the particles to a desired shape at the desired locus of filtration in said housing, heating the consolidated body to cure said resin thereby bonding said particles together in a resin matrix in the form of a rigid body which is bonded to the inner wall of said filter housing.
Claim 6
Dependent Claim
15 words
The method of claim 6, where said resin coated particles are resin coated glass beads.
References Cited (Backward Citations)
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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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |