US3275460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold dressings for use in foundry practice
Assignee: Foseco International Ltd
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Filing: 1964-11-23
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Granted: 1966-09-27
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Expires: 1984-11-23
Abstract
No abstract record available.
Inventors
- 👤 Jeanneret Jean Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:46
CPC Classifications
B; B22; B22C; B22C3/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
94 words
A METHOD OF DRESSING A MOLD FOR METAL CUSTING WHICH COMPRISES APPLYING TO THE INNER SURFACE OF THE MOLD A COMPOSITION CONSISTING ESSENTIALLY OF SUSPENSION OF ABOUT 40 TO 80% BY WEIGHT OF FINELY DIVIDED REFRACTORY MATERIAL IN AN AQUEOUS MEDIUM WHICH INCLUDES, AS A SUSPENSION AGENT, ABOUT 0.05 TO ABOUT 1.5% BY WEIGHT OF A HIGHLY REFINED GUAR GUM CHARACTERIZED BY A BROOKFIELD VISCOSITY IN A 1% BY WEIGHT AQUEOUS SOLUTION AT 74*F. WITH A NO. 4 SPINDLE AT 6 R.P.M. OF ABOUT 22,500 CENTIPOISES AND AT 60 R.P.M. OF ABOUT 4,800 CENTIPOISES.
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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |