US3958322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of casting an alloy having the appearance of gold
Assignee: Individual
•
Filing: 1975-06-19
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Granted: 1976-05-25
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Expires: 1995-06-19
Abstract
Abstract Method of casting an alloy comprising copper, aluminum and indium utilizing lost wax process. After the wax process. After the wax is melted from an investment mold the mold temperature is normalized at 250°F by placement in an autoclave. Thereafter the alloy is centrifugally cast at 2,000°F while the mold is at 250°F.
Inventors
- 👤 William A. Rhodes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:53
CPC Classifications
B; B22; B22D; B22D25/00; B22D25/02; B22D25/026; B22C; B22C9/00; B22C9/02; B22C9/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49988; Y10T29/49989
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
128 words
A method of investment casting an alloy comprising aluminum, copper and Indium, wherein: an investment mold is placed in a furnace with a wax cavity forming part therein; heating the mold to burn the wax part therefrom and whereby forming a cavity in said mold; reducing the temperature of the furnace to a temperature ranging between 700° and 800° Fahrenheit, then removing the mold from the furnace at such temperature and placing the mold in an autoclave which has been preheated to approximately 250° Fahrenheit and allowing said mold to normalize at said temperature of 250° Fahrenheit, then heating said alloy to a molten temperature of approximately 2000° Fahrenheit; then centrifugally casting said alloy into said mold while said mold is at a temperature of approximately 250° Fahrenheit.
Claim 2
Independent Claim
128 words
A method of investment casting an alloy comprising aluminum, copper and Indium, wherein: an investment mold is placed in a furnace with a wax cavity forming part therein; heating the mold to burn the wax part therefrom and whereby forming a cavity in said mold; reducing the temperature of the furnace to a temperature ranging between 700° and 800° Fahrenheit, then removing the mold from the furnace at such temperature and placing the mold in an autoclave which has been preheated to approximately 250° Fahrenheit and allowing said mold to normalize at said temperature of 250° Fahrenheit, then heating said alloy to a molten temperature of approximately 2000° Fahrenheit; then centrifugally casting said alloy into said mold while said mold is at a temperature of approximately 250° Fahrenheit.
Claim 3
Dependent Claim
45 words
The invention as defined in claim 1, wherein: the mold is then cooled and the casting is removed from said mold; then tumbling said casting in an abrasive medium; then pickling said casting in acid to remove foreign matter from the surface of said casting.
Claim 4
Dependent Claim
27 words
The invention as defined in claim 2, wherein: said casting is then immersed in a base solution to neutralize and remove the pickling acid from said casting.
Claim 5
Dependent Claim
23 words
The invention as defined in claim 3, wherein: the casting is then buffed to produce a lustrous finish on the surface areas thereof.
References Cited (Backward Citations)
US3769006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-25 | 1979-11-24 | 1980-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-25 | 1983-11-24 | 1984-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-25 | 1987-11-24 | 1988-05-25 | $7700.00 | Window Closed / Lapsed |