US4178981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper casting method using titanium dioxide release method
Assignee: Kerr McGee Corp
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Filing: 1978-06-29
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Granted: 1979-12-18
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Expires: 1998-06-29
Abstract
Abstract A copper mold release material comprising titanium dioxide slurried in a liquid medium. The titanium dioxide is easily removed from a casting, if any adhers thereto, by washing with, for example, water and does not contaminate electrolytes utilized in electrolytic refining processes.
Inventors
- 👤 Edward C. Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:03
CPC Classifications
B; B22; B22C; B22C3/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
82 words
In the casting of copper in a mold wherein, the internal surface of the mold initially is coated with a release material slurried in a liquid medium, the mold then is filled with molten copper, and thereafter cooled and solidified copper is removed from the mold, the improvement which comprises utilizing as the release material a material consisting essentially of titanium dioxide in a particulate form having a particle size in the range of from about 0.1 micron to about 200 microns.
Claim 2
Dependent Claim
82 words
In the casting of copper in a mold wherein, the internal surface of the mold initially is coated with a release material slurried in a liquid medium, the mold then is filled with molten copper, and thereafter cooled and solidified copper is removed from the mold, the improvement which comprises utilizing as the release material a material consisting essentially of titanium dioxide in a particulate form having a particle size in the range of from about 0.1 micron to about 200 microns.
Claim 3
Dependent Claim
20 words
The process of claim 1 wherein the titanium dioxide is of the deagglomerated type with no additional chemical surface treatment.
Claim 4
Dependent Claim
19 words
The process of claim 1 wherein the titanium dioxide is of the agglomerated type with no additional surface preparation.
Claim 5
Dependent Claim
15 words
The process of claim 1 wherein the titanium dioxide is of the rutile crystal structure.
Claim 6
Dependent Claim
15 words
The process of claim 1 wherein the titanium dioxide is of the anatase crystal structure.
Claim 7
Dependent Claim
11 words
The process of claim 1 wherein the liquid medium is water.
Claim 8
Dependent Claim
26 words
The process of claim 1 wherein the particle size of the titanium dioxide is in the range of from about 0.1 micron to about 75 microns.
Claim 9
Dependent Claim
24 words
The process of claim 1 wherein the slurry of release material contains from about 2 percent to about 25 percent, by weight, titanium dioxide.
Claim 10
Dependent Claim
25 words
The process of claim 8 wherein the slurry of release material preferably contains from about 3 percent to about 10 percent, by weight, titanium dioxide.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-17 | 1983-06-18 | 1983-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-17 | 1987-06-18 | 1987-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-17 | 1991-06-18 | 1991-12-18 | $7700.00 | Window Closed / Lapsed |