Patent US3173619A successfully refreshed from Google Patents.
US3173619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball mills
Assignee: Monolith Portland Cement Co
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Filing: 1963-04-12
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Granted: 1965-03-16
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Expires: 1983-04-12
Abstract
No abstract record available.
Inventors
- 👤 Alif R Bryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:00
CPC Classifications
B; B02; B02C; B02C17/00; B02C17/18; B02C17/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A BALL MILL WHICH INCLUDES: FIRST AND SECOND BALL MILL SHELLS HAVING DIFFERENT DIAMETERS, EACH OF SAID SHELLS HAVING AN AXIS, SAID SHELLS BEING LOCATED CONCENTRICALLY ABOUT THE SAME AXIS, THE INTERIOR OF THE LARGER OF SAID SHELLS BEING SPACED FROM THE EXTERIOR OF THE OTHER OF SAID SHELLS; MEANS FOR TURNING SAID SHELLS INDEPENDENTLY OF ONE ANOTHER; MEANS FOR INTRODUCING MATERIAL TO BE GROUND INTO THE OUTER OF SAID SHELLS; MEANS FOR INTRODUCING GROUND MATERIAL FROM THE OUTER OF SAID SHELLS INTO THE INNER OF SAID SHELLS; MEANS FOR REMOVING THE GROUND MATERIAL FROM THE INNER OF SAID SHELLS.
Claim 2
Dependent Claim
100 words
A BALL MILL WHICH INCLUDES: FIRST AND SECOND BALL MILL SHELLS HAVING DIFFERENT DIAMETERS, EACH OF SAID SHELLS HAVING AN AXIS, SAID SHELLS BEING LOCATED CONCENTRICALLY ABOUT THE SAME AXIS, THE INTERIOR OF THE LARGER OF SAID SHELLS BEING SPACED FROM THE EXTERIOR OF THE OTHER OF SAID SHELLS; MEANS FOR TURNING SAID SHELLS INDEPENDENTLY OF ONE ANOTHER; MEANS FOR INTRODUCING MATERIAL TO BE GROUND INTO THE OUTER OF SAID SHELLS; MEANS FOR INTRODUCING GROUND MATERIAL FROM THE OUTER OF SAID SHELLS INTO THE INNER OF SAID SHELLS; MEANS FOR REMOVING THE GROUND MATERIAL FROM THE INNER OF SAID SHELLS.
References Cited (Backward Citations)
US1520537A
Cited
US1710659A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |