US2558402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold composition
Assignee: Whitehead Brothers Co
•
Filing: 1948-10-23
•
Granted: 1951-06-26
•
Expires: 1968-10-23
Abstract
No abstract record available.
Inventors
- 👤 Burgess P Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:59
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
75 words
A MOLDING COMPOSITION FOR METAL CASTING PURPOSES, THE SAME CONSISTING ESSENTIALLY OF SILICA SAND OF A SELECTED GRAIN SIZE SUITABLE FOR PRODUCING THE DESIRED CASTING, THE GRAINS OF SUCH SAND BEING COATED WITH REDDISH BROWN PLATELETS OF COLLOIDAL BITUMINOUS COAL OF A PARTICLE SIZE BETWEEN ABOUT TWO AND ONE HUNDRED MILLIMICRONS ADMIXED WITH A HEAVY HYDROCARBON AND SAID MOLDING COMPOSITION ALSO CONTAININ AN AMOUNT OF A BONDING CLAY SUFFICIENT TO IMPART DESIRABLE MOLDING CHARACTERISTICS THERETO.
References Cited (Backward Citations)
GB189815619A
Cited
US1221259A
Cited
US1673356A
Cited
GB248289A
Cited
US1777998A
Cited
US1959179A
Cited
GB426077A
Cited
US2159952A
Cited
US2348155A
Cited
US2398047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |