Patent US3655414A successfully refreshed from Google Patents.
US3655414A
Expired / Lapsed
US
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Foundry mold process and pattern composition
Assignee: Atlantic Richfield Co
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Filing: 1969-06-10
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Granted: 1972-04-11
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Expires: 1989-06-10
Abstract
Abstract Novel pattern materials for use in investment casting by the Lost Wax process are disclosed. The pattern materials consist essentially of waxes such as petroleum waxes, natural vegetable or mineral waxes, synthetic waxes and various resinous materials derived from the refining of petroleum and wood resin, and mixtures of the above. The base wax generally has a melting point of between about 120* to 180* F. The base wax composition is improved by the inclusion of up to about 75 percent by weight, preferably a minor amount, of solid filler particles of a phthalic acid. Isophthalic acid is the preferred filler.
Inventors
- 👤 William D Hoffman
- 👤 Allen E Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:27
CPC Classifications
B; B22; B22C; B22C7/00; B22C7/02; C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/092
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
20 words
In the method of claim 1 whereIn the maximum dimension of the filler particles is up to about 600 microns.
Claim 2
Dependent Claim
11 words
The method of claim 2 wherein the filler is isophthalic acid.
Claim 3
Dependent Claim
20 words
In the method of claim 3 wherein the maximum dimension of the filler particles is up to about 250 microns.
Claim 4
Dependent Claim
18 words
In the method of claim 4 wherein the base wax comprises a major amount of the pattern material.
Claim 5
Dependent Claim
44 words
In the method of claim 1 wherein the base wax contains about 5 to 40 weight percent paraffin wax, about 5 to 40 weight percent microcrystalline wax, about 5 to 40 weight percent vegetable wax and about 15 to 50 weight percent terpene resin.
Claim 6
Dependent Claim
23 words
In the method of claim 6 wherein the paraffin wax has a melting point in the range of about 135* to 160* F.
Claim 7
Dependent Claim
23 words
In the method of claim 7 wherein the microcrystalline wax has a melting point in the range of about 130* to 180* F.
Claim 8
Dependent Claim
13 words
In the method of claim 8 wherein the vegetable wax is carnauba wax.
Claim 9
Dependent Claim
57 words
A pattern material composition suitable for use in the lost wax process which consists essentially of base wax melting in the range of about 120* to 180* F. and about 5 to 75 percent by weight of the composition of finely divided filler particles selected from the group consisting of isophthalic acid, terephthalic acid and orthophthalic acid.
Claim 10
Dependent Claim
19 words
The composition of claim 10 wherein the maximum dimension of the filler particles is up to about 600 microns.
Claim 11
Dependent Claim
19 words
The composition of claim 11 wherein the maximum dimension of the filler particles is up to about 250 microns.
Claim 12
Dependent Claim
11 words
The composition of claim 12 wherein the filler is isophthalic acid.
Claim 13
Dependent Claim
17 words
The composition of claim 13 wherein the base wax comprises a major amount of the pattern material.
Claim 14
Dependent Claim
43 words
The composition of claim 10 wherein the base wax contains about 5 to 40 weight percent paraffin wax, about 5 to 40 weight percent microcrystalline wax, about 5 to 40 weight percent vegetable wax and about 15 to 50 weight percent terpene resin.
Claim 15
Dependent Claim
22 words
The composition of claim 15 wherein the paraffin wax has a melting point in the range of about 135* to 160* F.
Claim 16
Dependent Claim
22 words
The composition of claim 16 wherein the microcrystalline wax has a melting point in the range of about 130* to 180* F.
Claim 17
Dependent Claim
12 words
The composition of claim 17 wherein the vegetable wax is carnauba wax.
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |