US3607319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making refractory molds
Assignee: Avnet Inc
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Filing: 1969-03-05
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Granted: 1971-09-21
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Expires: 1989-03-05
Abstract
Abstract A refractory mold is prepared from a prehydrolyzed organic silicate and a particulate refractory material having a coating prepared from an air-stable organic base, water and a watersoluble polyhydric alcohol or an ester thereof.
Inventors
- 👤 Robert K Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:42
CPC Classifications
B; B28; B28B; B28B7/00; B28B7/34; B28B7/346
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
18 words
The method of claim 1 wherein the amount of said organic base is from 0.1 to 1 percent.
Claim 2
Dependent Claim
19 words
The method of claim 1 wherein the organic base is an amine having from 2 to 22 carbon atoms.
Claim 3
Dependent Claim
39 words
The method of claim 1 wherein the polyhydric alcohol employed is selected from the group consisting of glycerol, ethylene glycol, 1, 2, 6-hexanetrial, propylene glycol, diethylene glycol, butylene glycols, amylene glycols, hexanediols, triethylene glycol, erythritol, arabitol and glycol monoacetate.
Claim 4
Dependent Claim
34 words
The method of claim 1 wherein the organic base is selected from the group consisting of diethylamino propylamine, diethylene triamine, triethylene tetramine, tetraethylene pentamine, imino-bispropylamine, dibutyl amine, 2-ethylhexyl amine, di(2-ethylhexyl)amine, 1,3-propylenediamine and amine carbonates.
Claim 5
Dependent Claim
22 words
The method of claim 1 wherein the coating of the particulate refractory material includes spraying the coating solution on tumbling refractory particles.
Claim 6
Dependent Claim
25 words
The method of claim 1 which includes slurrying the thin-liquid-coated refractory material into a solution of ethyl silicate in an ethyl alcohol aqueous acidic solution.
Claim 7
Dependent Claim
24 words
The particulate refractory material characterized by the residual thin-liquid coating of the coating solution containing said organic base as set forth in claim 1.
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |