US3266108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foundry core fabrication process
Assignee: Archer Daniels Midland Co
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Filing: 1964-01-08
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Granted: 1966-08-16
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Expires: 1984-01-08
Abstract
No abstract record available.
Inventors
- 👤 Edward B Dunning
- 👤 Roger H Kottke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:17
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/12; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C5/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
79 words
THE PROCESS FOR THE FORMATION OF FOUNDRY CORES, WHICH COMPRISES MIXING SAND WITH A RESIN SOLUTION, DRYING THE RESULANT MIXTURE TO FORM FREE-FLOW, RESIN-COATED SAND, PLACING SAID COATED SAND IN AMOLD AND COMPRESSING SAID COATED SAND THEREIN TO FORM A CORE, PRESSURIZING SAID MOLD WITH A SOLVENT TO SOLVATE SAID RESIN WHILE MAINTAINING SAID CORE UNDER COMPRESSION IN SAID MOLD AND SUBSEQUENTLY REDUCING THE PRESSURE IN SAID MOLD REMOVE SAID SOLVENT, AND REMOVING THE RESULTANT CORE FROM SAID MOLD.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |