Patent US3587980A successfully refreshed from Google Patents.
US3587980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlling the rate of feed to an extraneously energized airswept mill
Assignee: ThyssenKrupp Industrial Solutions AG
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Filing: 1969-01-13
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Granted: 1971-06-28
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Expires: 1989-01-13
Abstract
Abstract IN THE CONTROLLING OF THE RATE OF FEED OF FRESH MATERIAL TO AN EXTRANEOUSLY ENERGIZED AIRSWEPT MILL FROM WHICH ONLY PART OF THE OUTPUT OF MATERIAL IS EXTRACTED BY THE AIR STREAM AND A FURTHER PART DEPOSITED FROM THE MILL IS REFED MECHANICALLY TO THE MILL, A CONTROL SIGNAL IS DERIVED FROM THE DEGREE OF FULLNESS OF THE MILL, AND A CONTROL SIGNAL IS DERIVED FROM THE AMOUNT OF MATERIAL MECHANICALLY REFED TO THE MILL. ONE OF THE TWO CONTROL SIGNALS IS USED TO CONTROL THE NOMINAL OR TARGET VALUE OF THE RATE OF FEED OF FRESH MATERIAL, AND THE OTHER CONTROL SIGNAL IS USED TO CONTROL THE ACTUAL VALUE OF SUCH RATE OF FEED.
Inventors
- 👤 Heinrich Henne
- 👤 Peter Tiggesbaumker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:51
CPC Classifications
B; B02; B02C; B02C25/00
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |