US3587713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of moulds and castings
Assignee: Monsanto Chemicals Ltd
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Filing: 1968-06-11
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Granted: 1971-06-28
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Expires: 1988-06-11
Abstract
Abstract PRODUCTION OF A CERAMIC SHELL MOULD FOR USE IN METAL CASTING WHICH COMPRISES FORMING ON A DISPOSABLE PATTERN A SHELL MOULD, REMOVING THE PATTERN, FIRING THE MOULD, CASTING METAL INTO SAID MOULD, SOLIDIFYING SAID METAL AND REMOVING SAID MOULD FROM SAID SOLIDIFIED METAL. THE SHELL MOULD IS CHARACTERIZED BY CONTAINING A PARTIUCLATE CERAMIC REFRACTORY MATERIAL, A BINDING AGENT AND AN INORGANIC MATERIAL WHICH LOSES CARBON DIOXIDE UPON FIRING TO FORM AN OXIDE.
Inventors
- 👤 Gordon Halsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:00
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/02; B22C9/04; B22C1/00; B22C1/16; B22C1/165
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |