US4940561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming a polymeric mold
Assignee: Hydrabaths Inc
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Filing: 1989-02-06
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Granted: 1990-07-10
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Expires: 2009-02-06
Abstract
Abstract A method of forming a coating useful for forming casting molds including agitating a quantity of polyester resin and admixing into the resin a quantity of aluminum powder, storing the mixture for 12 to 24 hours, introducing a catalyst into the mixture and spraying the mixture onto an object defining a mold cavity of a casting mold. The atomized aluminum powder should have a weight ratio of 10 to 50 percent of the resin and should have a ration of 4 times 200 mesh/ 1 times 400 mesh+2 times 200 mesh/1 times 400 mesh.
Inventors
- 👤 Kenneth E. Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:53
CPC Classifications
C; C09; C09D; C09D167/00; C09D167/06; B; B29; B29C; B29C33/00; B29C33/56; B29C37/00; B29C37/0025; B29C37/0028; B29C37/0032; B29C41/00; B29C41/02; B29C41/08; B29K; B29K2067/00; B29K2105/00; B29K2105/06; B29K2105/16; B29K2705/00; B29K2705/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
106 words
A method for producing a coating useful in forming casting molds comprising the steps of: agitating a quantity of pre-promoted polyester resin in a container; admixing into said resin, in the course of said agitation, a quantity of atomized aluminum powder to a weight ratio of 10% to 50% of said resin said atomized aluminum powder admixed in said resin including aluminum powder comprising the ratios of ##EQU3## storing said mixture of said resin and powder for a period of 12 to 24 hours; introducing a catalyst into said mixture; and spraying said catalyzed mixture onto an object defining the mold cavity of a casting mold.
Claim 2
Independent Claim
106 words
A method for producing a coating useful in forming casting molds comprising the steps of: agitating a quantity of pre-promoted polyester resin in a container; admixing into said resin, in the course of said agitation, a quantity of atomized aluminum powder to a weight ratio of 10% to 50% of said resin said atomized aluminum powder admixed in said resin including aluminum powder comprising the ratios of ##EQU3## storing said mixture of said resin and powder for a period of 12 to 24 hours; introducing a catalyst into said mixture; and spraying said catalyzed mixture onto an object defining the mold cavity of a casting mold.
Claim 3
Dependent Claim
23 words
A method according to claim 1 wherein: said catalyzed mixture is sprayed onto said object to a thickness of 0.015 to 0.060 inches.
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) | 1993-07-09 | 1994-01-08 | 1994-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-09 | 1998-01-08 | 1998-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-09 | 2002-01-08 | 2002-07-10 | $7700.00 | Window Closed / Lapsed |