Patent US2586814A successfully refreshed from Google Patents.
US2586814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold composition for precision casting and method of forming mold
Assignee: Individual
•
Filing: 1949-05-18
•
Granted: 1952-02-26
•
Expires: 1969-05-18
Abstract
No abstract record available.
Inventors
- 👤 Jr Herbert Greenewald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:25
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/18; B22C1/181
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A MOLD COMPOSITION CONSISTING ESSENTIALLY OF A MIXTURE OF 85% TO 98% BY WEIGHT OF SILICA FLOUR AND 15% TO 2% BY WEIGHT OF BENTONITE, THE SILICA FLOUR HAVING A PARTICLE SIZE PREDOMINANTLY FINER THAN 200 MESH, AND FROM 10 TO 20 PARTS BY WEIGHT OF WATER ADDED TO 100 PARTS OF THE MIXTURE, THE WATER CONTENT BEING MORE IMPORTANT TO THE STRENGTH OF THE MOLD THAN THE CLAY CONTENT.
Claim 2
Dependent Claim
70 words
A MOLD COMPOSITION CONSISTING ESSENTIALLY OF A MIXTURE OF 85% TO 98% BY WEIGHT OF SILICA FLOUR AND 15% TO 2% BY WEIGHT OF BENTONITE, THE SILICA FLOUR HAVING A PARTICLE SIZE PREDOMINANTLY FINER THAN 200 MESH, AND FROM 10 TO 20 PARTS BY WEIGHT OF WATER ADDED TO 100 PARTS OF THE MIXTURE, THE WATER CONTENT BEING MORE IMPORTANT TO THE STRENGTH OF THE MOLD THAN THE CLAY CONTENT.
References Cited (Backward Citations)
US1926092A
Cited
US1278164A
Cited
US1657573A
Cited
US1935362A
Cited
US2201037A
Cited
US2256456A
Cited
US2299860A
Cited
US2322667A
Cited
US2399606A
Cited
US2461146A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-25 | 1955-08-27 | 1956-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-25 | 1959-08-27 | 1960-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-25 | 1963-08-27 | 1964-02-26 | $7700.00 | Window Closed / Lapsed |