US4055213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making patterns
Assignee: Individual
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Filing: 1976-08-30
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Granted: 1977-10-25
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Expires: 1996-08-30
Abstract
Abstract A method is provided for making a pattern comprising a metallic outer shell filled with a fill material. The method includes the steps of first forming a pattern of relatively soft material, then forming a shell as, for example, of plastic, around said wood pattern, and then electroplating a layer of metallic material within the shell to form a second shell which is then removed and in some cases filled with a fill material to provide the final pattern.
Inventors
- 👤 Richard G. Maher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:54
CPC Classifications
B; B22; B22C; B22C7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
The method of making a pattern and using said pattern in the fabrication of sand molds at elevated temperatures, comprising first fabricating a first pattern of the desired configuration out of relatively soft material, then forming a shell of plastic material on said first pattern, removing the first pattern from said shell, electroplating nickel to a thickness of at least about 0.100 inch on said shell to form a second pattern, the surface thereof consisting of an inner surface and an outer surface, removing said second pattern from the shell, and then using said second pattern as a pattern in the fabrication of sand molds at elevated temperatures, with one of the inner and outer surface of the pattern defining the surface for fabricating a sand mold and the other of said surfaces being substantially unsupported.
Claim 2
Independent Claim
136 words
The method of making a pattern and using said pattern in the fabrication of sand molds at elevated temperatures, comprising first fabricating a first pattern of the desired configuration out of relatively soft material, then forming a shell of plastic material on said first pattern, removing the first pattern from said shell, electroplating nickel to a thickness of at least about 0.100 inch on said shell to form a second pattern, the surface thereof consisting of an inner surface and an outer surface, removing said second pattern from the shell, and then using said second pattern as a pattern in the fabrication of sand molds at elevated temperatures, with one of the inner and outer surface of the pattern defining the surface for fabricating a sand mold and the other of said surfaces being substantially unsupported.
References Cited (Backward Citations)
US1649312A
Cited
US1570635A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-24 | 1981-04-25 | 1981-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-24 | 1985-04-25 | 1985-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-24 | 1989-04-25 | 1989-10-25 | $7700.00 | Window Closed / Lapsed |