Patent US2686728A successfully refreshed from Google Patents.
US2686728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Binders for baked sand cores and dry sand molds for use in casting metals
Assignee: Whitehead Brothers Co
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Filing: 1952-06-19
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Granted: 1954-08-17
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Expires: 1972-06-19
Abstract
No abstract record available.
Inventors
- 👤 Burgess P Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:49
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A FORTIFIED BINDER FOR BAKED SAND CORES AND DRY SAND MOLDS CONSISTING ESSENTIALLY OF A PYROGENOUS HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF COAL TAR PITCH AND OXIDIZED ASPHALTIC PITCHES THE SAME BEING INTIMATELY ADMIXED WITH FROM ONE AND ONE-HALF TO THREE PER CENT, BY WEIGHT OF THE MIXTURE OF A GLYCOL COMPOUND.
Claim 2
Dependent Claim
53 words
A FORTIFIED BINDER FOR BAKED SAND CORES AND DRY SAND MOLDS CONSISTING ESSENTIALLY OF A PYROGENOUS HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF COAL TAR PITCH AND OXIDIZED ASPHALTIC PITCHES THE SAME BEING INTIMATELY ADMIXED WITH FROM ONE AND ONE-HALF TO THREE PER CENT, BY WEIGHT OF THE MIXTURE OF A GLYCOL COMPOUND.
References Cited (Backward Citations)
US1127523A
Cited
US1827426A
Cited
US1868453A
Cited
US2288736A
Cited
US2432702A
Cited
US2415828A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-16 | 1958-02-15 | 1958-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-16 | 1962-02-15 | 1962-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-16 | 1966-02-15 | 1966-08-17 | $7700.00 | Window Closed / Lapsed |