Patent US4925611A successfully refreshed from Google Patents.
US4925611A
Expired / Lapsed
US
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Mold making method
Assignee: USBI BOOSTER PRODUCTION COMPANY Inc HUNTSVILLE ALABAMA A CORP OF DE
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Filing: 1987-10-19
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Granted: 1990-05-15
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Expires: 2007-10-19
Abstract
Abstract A method of making molds which is easy, quick and can be accomplished at room temperatures and atmospheric pressures. The method includes applying at least one layer of gel to a male mandrel and curing at least one layer of polyester impregnated fabric to the gel layer. At least one layer of epoxy impregnated fabric is cured to the polyester impregnated fabric. At least one layer of plaster impregnated is cured to the epoxy impregnated fabric. At least one layer of epoxy impregnated fabric is cured to the plaster impregnated fabric. The resulting mold is removed from the male mandrel.
Inventors
- 👤 Charles H. Shockney
- 👤 Roger L. Hill
- 👤 William T. White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:39
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/38; B29C33/3842; B29C37/00; B29C37/0025; B29C37/0028; B29C37/0032; B29C70/00; B29C70/04; B29C70/06; B29C70/08; B29C2037/0035; B29K; B29K2063/00; B29K2067/00; B29K2067/06; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/0809; B29K2863/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A method of manufacturing a mold particularly adapted for forming a complex shape comprising: (a) applying at least one layer of gel to a male mandrel and curing said gel layer wherein said gel is selected from the group consisting of epoxy and polyester; (b) curing at least one layer of polyester impregnated fabric to said gel layer; (c) curing at least one layer of epoxy impregnated fabric to said polyester impregnated fabric; (d) curing at least one layer consisting essentially of plaster impregnated fabric to said epoxy impregnated fabric; (e) curing at least one layer of epoxy impregnated fabric to said plaster impregnated fabric to manufacture said mold; and (f) removing said mold from said male mandrel; wherein said curing steps are capable of being accomplished at room temperature under atmospheric pressures.
Claim 2
Independent Claim
133 words
A method of manufacturing a mold particularly adapted for forming a complex shape comprising: (a) applying at least one layer of gel to a male mandrel and curing said gel layer wherein said gel is selected from the group consisting of epoxy and polyester; (b) curing at least one layer of polyester impregnated fabric to said gel layer; (c) curing at least one layer of epoxy impregnated fabric to said polyester impregnated fabric; (d) curing at least one layer consisting essentially of plaster impregnated fabric to said epoxy impregnated fabric; (e) curing at least one layer of epoxy impregnated fabric to said plaster impregnated fabric to manufacture said mold; and (f) removing said mold from said male mandrel; wherein said curing steps are capable of being accomplished at room temperature under atmospheric pressures.
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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) | 1993-05-14 | 1993-11-13 | 1994-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-14 | 1997-11-13 | 1998-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-14 | 2001-11-13 | 2002-05-15 | $7700.00 | Window Closed / Lapsed |