US3784451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating a composite mold having a resin-impregnated metal molding surface
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1972-04-24
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Granted: 1974-01-08
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Expires: 1992-04-24
Abstract
Abstract Producing a mould, particularly a prototype mould by spraying a metal shell on to model, impregnating the metal shell with a curable resin so that it is no longer porous, electroplating the shell to form a moulding surface and backing the shell to produce a mould.
Inventors
- 👤 P Garner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:19
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/56; Y; Y10; Y10S; Y10S29/00; Y10S29/012; Y10S29/039; Y10S425/00; Y10S425/03; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49982
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
25 words
A process according to claim 1 in which the metal shell is provided with a reinforcing backing before it is impregnated with a curable resin.
Claim 2
Dependent Claim
26 words
A process according to claim 1 in which the metal shell is formed by spraying metal on to a model of the article to be moulded.
Claim 3
Dependent Claim
20 words
A process according to claim 3 in which the model is coated with a release agent before spraying the metal.
Claim 4
Dependent Claim
16 words
A process according to claim 1 in which the metal shell is formed by flame spraying.
Claim 5
Dependent Claim
12 words
A process according to claim 1 in which the metal is zinc.
Claim 6
Dependent Claim
17 words
A process according to claim 1 in which the metal shell is at least 1/16 inch thick.
Claim 7
Dependent Claim
16 words
A process according to claim 1 in which the metal shell is about 0.25 inch thick.
Claim 8
Dependent Claim
14 words
A process according to claim 1 in which the resin comprises an epoxy resin.
Claim 9
Dependent Claim
14 words
A process according to claim 1 in which the resin comprises a polyester resin.
Claim 10
Dependent Claim
18 words
A process according to claim 1 in which the resin comprises amine aldehyde or phenol aldehyde condensation resin.
References Cited (Backward Citations)
US1681447A
Cited
US1834763A
Cited
US1935916A
Cited
US2680699A
Cited
US2793177A
Cited
US3101065A
Cited
US3548050A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |