US3645767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for coating ceramic molds
Assignee: Monsanto Chemicals Ltd
•
Filing: 1970-02-12
•
Granted: 1972-02-29
•
Expires: 1990-02-12
Abstract
Abstract The walls of the pattern cavity of a fired ceramic mold for use in metal casting are coated with a dispersion in a liquid medium of a particulate solid selected from graphite, molybdenum disulphide and aluminum and the liquid medium is evaporated to leave a deposit of the particulate solid of such thickness that the dimensions of the pattern cavity are not significantly altered. The coating reduces or eliminates mold-metal interaction thereby facilitating separating of the mould from the casting.
Inventors
- 👤 Percy Ronald Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:52
CPC Classifications
B; B22; B22C; B22C3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1331816A
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US2313674A
Cited
GB584160A
Cited
US2454910A
Cited
GB673320A
Cited
US3045301A
Cited
SU128982A1
Cited
US3035318A
Cited
US3235394A
Cited
FR1308902A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |