US3312403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine and process for reclaiming foundry sand
Assignee: Individual
•
Filing: 1964-12-31
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Granted: 1967-04-04
•
Expires: 1984-12-31
Abstract
No abstract record available.
Inventors
- 👤 Zifferer Lothar Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:57
CPC Classifications
B; B22; B22C; B22C5/00; B22C5/10; Y; Y10; Y10S; Y10S241/00; Y10S241/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
95 words
A PROCESS OF RECLAIMING BONDED FOUNDRY SAND FROM LUMPS, PIECES AND PARTICLES THEREOF RESULTING FROM SHAKEOUT OPERATIONS AND COMPRISING THE STEPS OF SUBJECTING PIECES AND PARTICLES OF BONDED SAND GRAINS REPEATEDLY TO SHARP IMPACT MADE RELATIVE TO A YIELDABLE RUBBER-LIKE SURFACE TO INDUCE REBOUNDING MOVEMENT OF THE MATERIAL AND EFFECT FURTHER IMPACT AND ABRASION WITHIN THE MOVING MASS OF MATERIAL BEING SUBJECTED TO SAID FIRST-MENTIONED IMPACT, THEREBY TO SEPARATE THE MATERIAL INTO INDIVIDUAL GRAINS AND SIMULTANEOUSLY ABRADE THE ADHERING BONDING MATERIAL THEREFROM, AND SEPARATING THE SAND GRAINS THUS CLEANED FROM THE WASTE ABRADED BONDING MATERIAL.
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) | 1970-04-03 | 1970-10-03 | 1971-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-03 | 1974-10-03 | 1975-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-03 | 1978-10-03 | 1979-04-04 | $7700.00 | Window Closed / Lapsed |