US2521839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory casting mold and method of making same
Assignee: AUSTENAL LAB Inc
•
Filing: 1949-08-11
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Granted: 1950-09-12
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Expires: 1969-08-11
Abstract
No abstract record available.
Inventors
- 👤 Roy C Feagin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:07
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/165; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
THE COMBINATION WITH A REFRACTORY MOLD BODY FORMED OF A COMMINUTED REFRACTORY MATERIAL MIXED WITH A BINDER OF ACID CHARACTER COMPRISING THE REACTION PRODUCTS FORMED BY ADDING AN AQUEOUS SOLUTION OF AN ALKALI METAL SILICATE TO AN AQUEOUS SOLUTION OF A MINERAL ACID, OF A COATING ON THE CASTING SURFACE OF THE MOLD BODY AND IN INTIMATE CONTACT THEREWITH, SAID COATING BEING FORMED OF A COMMINUTED REFRACTORY MATERIAL AND AND AQUEOUS SOLUTION OF AN ALKALI METAL SILICATE WHICH REACTS WITH SAID BINDER TO FORM A HYDRATED SILICIC ACID BONDING MEDIUM FOR SAID MOLD BODY AND SAID COATING.
Claim 2
Dependent Claim
97 words
THE COMBINATION WITH A REFRACTORY MOLD BODY FORMED OF A COMMINUTED REFRACTORY MATERIAL MIXED WITH A BINDER OF ACID CHARACTER COMPRISING THE REACTION PRODUCTS FORMED BY ADDING AN AQUEOUS SOLUTION OF AN ALKALI METAL SILICATE TO AN AQUEOUS SOLUTION OF A MINERAL ACID, OF A COATING ON THE CASTING SURFACE OF THE MOLD BODY AND IN INTIMATE CONTACT THEREWITH, SAID COATING BEING FORMED OF A COMMINUTED REFRACTORY MATERIAL AND AND AQUEOUS SOLUTION OF AN ALKALI METAL SILICATE WHICH REACTS WITH SAID BINDER TO FORM A HYDRATED SILICIC ACID BONDING MEDIUM FOR SAID MOLD BODY AND SAID COATING.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |