Patent US2945273A successfully refreshed from Google Patents.
US2945273A
Expired / Lapsed
US
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Casting mold and method of preparation
Assignee: Individual
•
Filing: 1958-04-23
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Granted: 1960-07-19
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Expires: 1978-04-23
Abstract
No abstract record available.
Inventors
- 👤 Herzmark Nicolas
- 👤 Clarens-Montreux
- 👤 Leschot Auguste
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:31
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/165; B22C9/00; B22C9/02; B22C9/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A SHELL MOLD FOR INVESTMENT CASTING CONSISTING ESSENTIALLY OF A COMMINUTED REFRACTORY MATERIAL AND A SILICA BINDER FOR SAID REFRACTORY MATERIAL, SAID MOLD COMPRISING AT LEAST ONE INNER LAYER IN WHICH THE MAJOR PORTION OF SAID BINDER IS PRESENT IN THE FORM OF SILICA GEL, THE BALANCE BEING ALKALI METAL SILICATE, AND AT LEAST ONE OUTER LAYER CONTAINING THE BINDER ESSENTIALLY IN THE FORM OF ALKALI METAL SILICATE, SAID INNER LAYER IMPARTING TO THE MOLD POROSITY AND ELASTICITY AND SAID OUTER LAYER IMPARTING STRENGTH AND RIGIDITY.
Claim 2
Dependent Claim
86 words
A SHELL MOLD FOR INVESTMENT CASTING CONSISTING ESSENTIALLY OF A COMMINUTED REFRACTORY MATERIAL AND A SILICA BINDER FOR SAID REFRACTORY MATERIAL, SAID MOLD COMPRISING AT LEAST ONE INNER LAYER IN WHICH THE MAJOR PORTION OF SAID BINDER IS PRESENT IN THE FORM OF SILICA GEL, THE BALANCE BEING ALKALI METAL SILICATE, AND AT LEAST ONE OUTER LAYER CONTAINING THE BINDER ESSENTIALLY IN THE FORM OF ALKALI METAL SILICATE, SAID INNER LAYER IMPARTING TO THE MOLD POROSITY AND ELASTICITY AND SAID OUTER LAYER IMPARTING STRENGTH AND RIGIDITY.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |