Patent US3402895A successfully refreshed from Google Patents.
US3402895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plant for the simultaneous grinding of differently grindable materials
Assignee: Rheinische Kalksteinwerke GmbH
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Filing: 1966-07-18
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Granted: 1968-09-24
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Expires: 1986-07-18
Abstract
No abstract record available.
Inventors
- 👤 Willmann Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:55
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/20; C07D239/22; B; B02; B02C; B02C17/00; B02C17/18; B02C21/00; C07D233/00; C07D233/54; C07D233/66; C07D233/72; C07D241/00; C07D241/02; C07D241/06; C07D241/08; C07D241/10; C07D241/14; C07D241/24; C07D241/26; C07D265/00; C07D265/28; C07D265/30; C07D265/32; C07D265/33; C09; C09B; C09B23/00; C09B23/14; C09B23/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
AN APPARATUS FOR THE SIMULTANEOUS GRINDING OF A PLURALITY OF RAW MATERIALS OF DIFFERENT GRINDABILITY IN CONSTANT AMOUNTS COMPRISING A TUBE MILL AND A HIGH SPEED MILL HAVING COMMON DISCHARGE OUTLETS, MEANS CHARGING A MIXTURE OF MATERIALS OF DIFFERENT GRINDABILITY TO SAID TUBE MILL, SEPARATING MEANS COMPRISING SORTING MEANS AND CLASSIFYING MEANS, SAID SORTING MEANS SEPARATING THE FINISHED GROUND MATERIAL AND DISCHARGING THE SAME, SAID CLASSIFYING MEANS SEPARATING THE GRITS AND THE COARSE GRAIN, CONVEYOR MEANS PASSING SAID COMMON DISCHARGE
Claim 2
Independent Claim
80 words
AN APPARATUS FOR THE SIMULTANEOUS GRINDING OF A PLURALITY OF RAW MATERIALS OF DIFFERENT GRINDABILITY IN CONSTANT AMOUNTS COMPRISING A TUBE MILL AND A HIGH SPEED MILL HAVING COMMON DISCHARGE OUTLETS, MEANS CHARGING A MIXTURE OF MATERIALS OF DIFFERENT GRINDABILITY TO SAID TUBE MILL, SEPARATING MEANS COMPRISING SORTING MEANS AND CLASSIFYING MEANS, SAID SORTING MEANS SEPARATING THE FINISHED GROUND MATERIAL AND DISCHARGING THE SAME, SAID CLASSIFYING MEANS SEPARATING THE GRITS AND THE COARSE GRAIN, CONVEYOR MEANS PASSING SAID COMMON DISCHARGE
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) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |