Patent US3755213A successfully refreshed from Google Patents.
US3755213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous resin bonded product
Assignee: Wallace Murray Corp
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Filing: 1971-03-22
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Granted: 1973-08-28
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Expires: 1991-03-22
Abstract
Abstract An improved rigid, porous product and process for making such product are disclosed. The product comprises a particulate material bound by a thermosetting resin and characterized by uniformly distributed and interconnecting porosity. The body initially is made by isostatic pressing of a mixture of the particulate material and resin and, inter alia, the cured body is suitable for use as a die, mold or filtering device.
Inventors
- 👤 V Kendall
- 👤 R Skriletz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:48
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/10; B28B7/12; B28B7/34; B28B7/344; B29; B29C; B29C33/00; B29C33/38; B29C33/3807; B29C33/3814; B29C33/44; B29C33/46; B29C33/56; B29C67/00; B29C67/20; B29C67/205; C; C08; C08J; C08J9/00; B29K; B29K2503/00; B29K2503/04; B29K2503/06; Y; Y10; Y10S; Y10S264/00; Y10S264/50
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
21 words
The body of claim 1 wherein said particles have an average particle diameter of from about 2 to about 5 microns.
Claim 2
Dependent Claim
27 words
The body of claim 1 wherein the filler particles are selected from the group consisting of metal and metalloid salts and oxides, metals, alloys and ceramic materials.
Claim 3
Dependent Claim
12 words
The body of claim 3 wherein the particles are a metal oxide.
Claim 4
Dependent Claim
39 words
The body of claim 1 wherein the thermosetting resin binder is taken from the group consisting of epoxy resins, phenol-formaldehyde resins, urea-formaldehyde resins, polyester resins, polyesters modified with sytrene, urea-formaldehyde - furfuryl alcohol resins, urea-melamine resins and polycarbonate resins.
Claim 5
Dependent Claim
13 words
The body of claim 5 wherein the thermosetting resin is an epoxy resin.
Claim 6
Dependent Claim
33 words
The body of claim 1 wherein the thermosetting resin completes a sufficient amount of curing in from 3 to 6 hours at about ambient temperature under about 300 p.s.i. pressure to become self-supporting.
Claim 7
Dependent Claim
9 words
A mold made of the body of claim 1
Claim 8
Dependent Claim
10 words
A jiggering mold made of the body of claim 1.
Claim 9
Dependent Claim
13 words
The porous, rigid body of claim 3 wherein said inert filler is alumina.
Claim 10
Dependent Claim
13 words
The porous, rigid body of claim 6 wherein said inert filler is alumina.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |