US3305900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquidless foundry molding process
Assignee: Archer Daniels Midland Co
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Filing: 1964-10-29
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Granted: 1967-02-28
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Expires: 1984-10-29
Abstract
No abstract record available.
Inventors
- 👤 Robert J Mulligan
- 👤 Jerome J Wendt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:28
CPC Classifications
B; B22; B22C; B22C3/00; B22C23/00; B22C23/02; B22C9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A LIQUIDLESS FOUNDRY PROCESS FOR IMPROVING THE SURFACE CHARACTERISTICS OF FOUNDRY SAND STRUCTURES WHICH COMPRISES CONTACTING THE SURFACE OF A MOLD OR CORE WITH A GASEOUS SUSPENSION OF FINELY DIVIDED REFRACTORY MATERIAL WHEREIN SAID GASEOUS SUSPENSION IS A FLUIDIZED BED TO THEREBY FORM A THIN SURFACE COATING OF REFRACTORY MATERIAL ON SAID MOLD OR CORE WHEREIN SAID SURFACE IS ALSO CONTACTED WITH THERMOPLASTIC RESIN, SAID RESIN BEING MELTED SUFFICIENTLY TO FIRMLY BOND SAID REFRACTORY MATERIAL TO THE SURFACE OF SAID SAND STRUCTURE ON COOLING AND WHEREIN SAID REFRACTORY MATERIAL HAS A PARTICLE SIZE BELOW 100 MESH.
Claim 2
Dependent Claim
96 words
A LIQUIDLESS FOUNDRY PROCESS FOR IMPROVING THE SURFACE CHARACTERISTICS OF FOUNDRY SAND STRUCTURES WHICH COMPRISES CONTACTING THE SURFACE OF A MOLD OR CORE WITH A GASEOUS SUSPENSION OF FINELY DIVIDED REFRACTORY MATERIAL WHEREIN SAID GASEOUS SUSPENSION IS A FLUIDIZED BED TO THEREBY FORM A THIN SURFACE COATING OF REFRACTORY MATERIAL ON SAID MOLD OR CORE WHEREIN SAID SURFACE IS ALSO CONTACTED WITH THERMOPLASTIC RESIN, SAID RESIN BEING MELTED SUFFICIENTLY TO FIRMLY BOND SAID REFRACTORY MATERIAL TO THE SURFACE OF SAID SAND STRUCTURE ON COOLING AND WHEREIN SAID REFRACTORY MATERIAL HAS A PARTICLE SIZE BELOW 100 MESH.
References Cited (Backward Citations)
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US2834741A
Cited
US3032816A
Cited
US2844489A
Cited
US3002231A
Cited
US3196033A
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US3150424A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |