Patent US2525175A successfully refreshed from Google Patents.
US2525175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foundry composition and method of making same
Assignee: Eastern Clay Products Inc
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Filing: 1947-08-13
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Granted: 1950-10-10
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Expires: 1967-08-13
Abstract
No abstract record available.
Inventors
- 👤 Keyser Naaman Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:14
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/167
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
TREATED FOUNDRY SANDS POSSESSING NONBURNING-ON PROPERTIES, COMPRISING DISCRETE PARTICLES OF SILICA SAND, AND A DRIED COATING ON THE SURFACE OF THE SANDD PARTICLES INITIALLY AMOUNTING TO ABOUT 2% BY WEIGHT OF SAND AND ITSELF CONSISTING OF ABOUT 2% BENTONITE, 43% POWDERED "VANADISET" AND 55% WATER FROM WHICH THE WATER IS REMOVED.
Claim 2
Dependent Claim
51 words
TREATED FOUNDRY SANDS POSSESSING NONBURNING-ON PROPERTIES, COMPRISING DISCRETE PARTICLES OF SILICA SAND, AND A DRIED COATING ON THE SURFACE OF THE SANDD PARTICLES INITIALLY AMOUNTING TO ABOUT 2% BY WEIGHT OF SAND AND ITSELF CONSISTING OF ABOUT 2% BENTONITE, 43% POWDERED "VANADISET" AND 55% WATER FROM WHICH THE WATER IS REMOVED.
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US1561956A
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US2159952A
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US2162059A
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US2230939A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-09 | 1954-04-10 | 1954-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-09 | 1958-04-10 | 1958-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-09 | 1962-04-10 | 1962-10-10 | $7700.00 | Window Closed / Lapsed |