US3716946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for cleaning and recuperating shot in the circulatory system of blasting apparatus
Assignee: Badische Maschinenfabrik GmbH
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Filing: 1970-12-08
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Granted: 1973-02-20
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Expires: 1990-12-08
Abstract
Abstract A METHOD AND APPARATUS FOR CLEANING AND RECUPERATING SHOT IN WHICH MATERIAL THAT IS SEPARATED FROM THE SHOT IN A FIRST AIR SEPARATOR, DOES NOT REACH THE AIR LINE SYSTEM TOGETHER WITH THE CLEANING AIR BUT IS SEPARATED IN A SECOND AIR SEPARATOR DOWNSTREAM OF THE CASCADES OF THE FIRST AIR SEPARATOR BY REASON OF ITS LARGER GRAIN SIZE OR HIGHER SPECIFIC WEIGHT AND IS CONDUCTED TO A MAGNETIC SEPARATOR WHOSE OUTLET FOR MAGNETIC MATERIAL IS CONDUCTED BACK TO THE SHOT CIRCULATORY SYSTEM OF THE APPARATUS.
Inventors
- 👤 M Graf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:22
CPC Classifications
B; B24; B24C; B24C9/00; B24C9/006; Y; Y02; Y02P; Y02P70/00; Y02P70/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |