Patent US3660223A successfully refreshed from Google Patents.
US3660223A
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Rigid, flexible and composite solid objects having cellulose containing rice hull particles and radiation induced polymer and method of making same
Assignee: SAMUEL L CASALINA
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Filing: 1968-09-16
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Granted: 1972-05-02
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Expires: 1988-09-16
Abstract
Abstract Discrete, cellulose containing, rice hull particles are impregnated with a monomer, usually a liquid, having a radiation activatable reaction group, molded under pressure to place the particles in substantially touching relation and form an article, and subjected to high-intensity ionizing radiation to polymerize the monomer and bind the particles into an object of stable shape. Additionally, the monomer may be selected to produce objects that are rigid and hard or flexible and resilient. A composite layered article is also disclosed.
Inventors
- 👤 Samuel L Casalina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:34
CPC Classifications
B; B32; B32B; B32B21/00; B32B21/12; B27; B27N; B27N5/00; B32B5/00; B32B5/16; C; C08; C08L; C08L97/00; C08L97/02; E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/24; E04C2/243; B32B2260/00; B32B2260/02; B32B2260/026; B32B2260/04; B32B2260/046; B32B2419/00; B32B2419/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
35 words
An object as defined in claim 1 wherein the ratio of said monomer to said rice hull particles is in the range of between about 3.8 to 1 and about 0.05 to 1 by weight.
Claim 2
Dependent Claim
35 words
An object as defined in claim 1 wherein the ratio of said monomer to said rice hull particles is in the range of between about 1.0 to 1 and about 0.15 to 1 by weight.
Claim 3
Dependent Claim
41 words
An object as defined in claim 1 wherein said polymer is formed from a liquid monomer having the chemical structural formula where n is an integer from 0 to 2 and m is an integer from 1 to 4, both inclusive.
Claim 4
Dependent Claim
13 words
An object as defined in claim 4 wherein said monomer is methyl methacrylate.
Claim 5
Dependent Claim
13 words
An object as defined in claim 4 wherein said monomer is ethyl acrylate.
Claim 6
Dependent Claim
14 words
An object as defined in claim 6 wherein said rice hull particles are parboiled.
References Cited (Backward Citations)
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Cited
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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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |