US2668774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold surface coating
Assignee: Individual
•
Filing: 1950-09-12
•
Granted: 1954-02-09
•
Expires: 1970-09-12
Abstract
No abstract record available.
Inventors
- 👤 Louis H Heyl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:04
CPC Classifications
B; B22; B22C; B22C3/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
62 words
A COATING COMPOSITION FOR CORE OR MOLD SURFACES USED IN THE ART OF METAL CASTING, CONSISTING ESSENTIALLY OF A REFRACTORY MATERIAL, A BINDING MATERIAL CONSISTING OF AN AQUEOUS ASPHALT EMULSION, THE BINDER BEING PRESENT IN A PROPORTION BETWEEN 2% AND 50% BY WEIGHT, AND WATER BEING ADDED IN SUFFICIENT QUANTITY TO MAKE A SOLUTION HAVING A GRAVITY OF SUBSTANTIALLY 32 DEGREES BAUME.
References Cited (Backward Citations)
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Cited
US2159952A
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US2270770A
Cited
US2348155A
Cited
US2502473A
Cited
US2525175A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |