Patent US4086118A successfully refreshed from Google Patents.
US4086118A
Expired / Lapsed
US
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Rigid composite articles and a method for their manufacture
Assignee: Individual
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Filing: 1976-10-04
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Granted: 1978-04-25
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Expires: 1996-10-04
Abstract
Abstract Rigid composite articles comprising a relatively thin, impression-retaining surface formed of a hard, rigid, room-temperature cured urethane resin and a relatively thick backing and reinforcing are made by casting a thin layer of urethane resin on the surface of a master, curing the urethane, then casting thereon a relatively thick backing layer of a casting material such as plaster or resin.
Inventors
- 👤 Frank Dewey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:34
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/38; B29C33/3842; B29C33/3857; B29C33/40; B29C33/56; B29K; B29K2875/00; Y; Y10; Y10S; Y10S428/00; Y10S428/908; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24983; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/25; Y10T428/254; Y10T428/259; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/31504; Y10T428/31511; Y10T428/31525; Y10T428/31551; Y10T428/31554; Y10T428/31598
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
118 words
A method for forming a rigid composite article comprising an outer impression-retaining thin surface layer and a relatively thick backing layer comprising (a) providing a master having coated on the surfaces therof a mold release material, (b) coating the surfaces of the master with a catalyzed liquid urethane resin. (c) curing said urethane resin to form a rigid surface layer having a thickness of from about 0.0675 inch to about 0.25 inch and a Shore durometer hardness of from about 65D to about 90D, (d) placing on the back surface of said rigid surface layer a relatively thick backing layer of a curable material, (e) curing said backing layer, and (f) recovering the rigid composite article so produced.
Claim 2
Independent Claim
118 words
A method for forming a rigid composite article comprising an outer impression-retaining thin surface layer and a relatively thick backing layer comprising (a) providing a master having coated on the surfaces therof a mold release material, (b) coating the surfaces of the master with a catalyzed liquid urethane resin. (c) curing said urethane resin to form a rigid surface layer having a thickness of from about 0.0675 inch to about 0.25 inch and a Shore durometer hardness of from about 65D to about 90D, (d) placing on the back surface of said rigid surface layer a relatively thick backing layer of a curable material, (e) curing said backing layer, and (f) recovering the rigid composite article so produced.
Claim 3
Dependent Claim
33 words
The method of claim 1 further comprising the step of coating the back surface of said rigid surface layer with an epoxy adhesive prior to the step of placing thereon said backing layer.
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein the curable material is plaster of paris.
Claim 5
Dependent Claim
21 words
The method of claim 1 wherein the curable material is selected from the group consisiting of epoxy resin and urethane resin.
Claim 6
Dependent Claim
24 words
The method of claim 4 wherein the curable material further includes a filler selected from the group consisting of mineral fillers and glass fibers.
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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) | 1981-04-24 | 1981-10-24 | 1982-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-24 | 1985-10-24 | 1986-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-24 | 1989-10-24 | 1990-04-25 | $7700.00 | Window Closed / Lapsed |