Patent US2683296A successfully refreshed from Google Patents.
US2683296A
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Method of preparing shell molds and composition therefor
Assignee: Monsanto Chemicals Ltd
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Filing: 1951-11-17
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Granted: 1954-07-13
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Expires: 1971-11-17
Abstract
No abstract record available.
Inventors
- 👤 Manuel F Drumm
- 👤 Cook Robert Ruffin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:59
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
72 words
A COMPOSITION SUITABLE FOR THE PREPARATION OF SHELL MOLDS FOR CASTING MOLTEN METALS, SAID COMPOSITION CONSISTING ESSENTIALLY OF 100 PARTS OF A PARTICULATE INORGANIC MATERIAL HAVING A FUSING TEMPERATURE ABOVE 2500* C., FROM 1 TO 15 PARTS OF A FUSIBLE PULVERULENT THERMOSETTING RESIN AND FROM 0.1 TO 20 PARTS OF A PULVERULENT MINERAL TAKEN FROM THE GROUP CONSISTING OF CRYOLITE, CYOLITHIONITE, PACHNOLITE AND MIXTURES THEREOF, SAID COMPOSITIONS HAVING SUBSTANTIALLY NO GREEN STRENGTH.
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) | 1957-07-12 | 1958-01-11 | 1958-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-12 | 1962-01-11 | 1962-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-12 | 1966-01-11 | 1966-07-13 | $7700.00 | Window Closed / Lapsed |