US3892579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive refractory protective composition for investment casting
Assignee: American Dental Association
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Filing: 1973-03-22
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Granted: 1975-07-01
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Expires: 1993-03-22
Abstract
Abstract An adhesive refractory composition useful in investment casting to secure wax or plastic preforms to a pattern, and as a protective coat on the inner surface of a mold. The composition consists of a tacky organic solvent solution of a refractory metal salt (zirconium octoate in methylene chloride) having dispersed therein fine granules of a refractory ceramic material (zircon).
Inventors
- 👤 Jr Curtis P Mabie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:16
CPC Classifications
B; B22; B22C; B22C7/00; B22C7/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
57 words
AN ORGANIC SOLVENT DISPERSION USEFUL IN INVESTMENT CASTING TO SECURE PERFORMS TO A PATTERN COMPRISING METHYLENE CHLORIDE HAVING DISSOLVED THEREIN ZIRCONIUM OCTOTATE, SAID SOLUTION HAVING DISPERSED THEREIN VERY FINE GRANULES OF A REFACTORY MATERIAL HAVING A PARTICLE SIZE PREDOMINATELY IN THE RANGE OF 2-5 MICRONS MEAN DIAMETER, SAID ZIRCONIUM OCTOTATE COMPRISING 20-40% BY WEIGHT OF THE DISPERSION.
Claim 2
Dependent Claim
57 words
AN ORGANIC SOLVENT DISPERSION USEFUL IN INVESTMENT CASTING TO SECURE PERFORMS TO A PATTERN COMPRISING METHYLENE CHLORIDE HAVING DISSOLVED THEREIN ZIRCONIUM OCTOTATE, SAID SOLUTION HAVING DISPERSED THEREIN VERY FINE GRANULES OF A REFACTORY MATERIAL HAVING A PARTICLE SIZE PREDOMINATELY IN THE RANGE OF 2-5 MICRONS MEAN DIAMETER, SAID ZIRCONIUM OCTOTATE COMPRISING 20-40% BY WEIGHT OF THE DISPERSION.
Claim 3
Dependent Claim
14 words
The solvent dispErsion of claim 1 wherein has zircon granules is said refractory material.
Claim 4
Dependent Claim
22 words
The solvent solution of claim 2 in which the zircon granules comprise from 40-60% by weight of the weight of the dispersion.
Claim 5
Dependent Claim
11 words
The solvent solution of claim 1 which also includes cobalt octoate.
Claim 6
Dependent Claim
135 words
In a method for making an investment mold for casting metal objects from a refractory casting utilizing wax or plastic preforms, the improvement which comprises: a. providing a refractory casting, b. dipping said casting in a slurry of zircon granules dispersed in a solution of zirconium octoate and methylene chloride said octoate comprising 20-40% by weight of the slurry to provide a thin tacky film on the casting, having a thickness of not more than 20 microns, c. applying wax or plastic preforms to the tacky film to produce a model of precisely the desired shape, d. repeating the dipping step of step b, e. applying an outer ceramic investment to the coated casting, and f. burning out the casting to provide an investment mold having a liner of less than 20 microns in thickness.
Claim 7
Dependent Claim
135 words
In a method for making an investment mold for casting metal objects from a refractory casting utilizing wax or plastic preforms, the improvement which comprises: a. providing a refractory casting, b. dipping said casting in a slurry of zircon granules dispersed in a solution of zirconium octoate and methylene chloride said octoate comprising 20-40% by weight of the slurry to provide a thin tacky film on the casting, having a thickness of not more than 20 microns, c. applying wax or plastic preforms to the tacky film to produce a model of precisely the desired shape, d. repeating the dipping step of step b, e. applying an outer ceramic investment to the coated casting, and f. burning out the casting to provide an investment mold having a liner of less than 20 microns in thickness.
Claim 8
Dependent Claim
17 words
The method according to claim 5 wherein the resultant liner has a thickness of about 10 microns.
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) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |