Patent US3131875A successfully refreshed from Google Patents.
US3131875A
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Method of and apparatus for grinding a solid in a liquid
Assignee: Individual
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Filing: 1961-08-17
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Granted: 1964-05-05
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Expires: 1981-08-17
Abstract
No abstract record available.
Inventors
- 👤 Szegvari Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:18
CPC Classifications
B; B02; B02C; B02C17/00; B02C17/16; A; A23; A23G; A23G3/00; A23G3/02; A23G3/0205; B22; B22F; B22F9/00; B22F9/02; B22F9/04; B24; B24B; B24B31/00; B24B31/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
121 words
IN THE METHOD OF GRINDING BY A MASS OF SUBSTANTIALLY SPHERICAL GRINDING ELEMENTS ALL OF SUBSTANTIALLY THE SAME SIZE WHICH ARE MAINTAINED IN SUBSTANTIALLY CONSTANT MOTION OUT OF STATIC CONTACT WITH ONE ANOTHER IN THE PRESENCE OF THE MATERIAL TO BE GROUND, BY MOVING THERETHROUGH STREAMLINED AGITATING MEANS WHICH HAS A CROSS SECTION SUBSTANTIALLY THAT OF THE VERTICAL CROSS SECTION OF A TEAR DROP, THE IMPROVEMENT IN WHICH THE THIN FORWARD EDGE OF THE AGITATING MEANS IS MOVED INTO THE MASS OF AGITATING ELEMENTS AS THE LEADING EDGE THEREBY SPREADING A PATH FOR THE AGITATING MEANS AND FOLLOWING THIS THE BLUNT EDGE IS MOVED THROUGH THE AGITATING MASS WHEREBY VIOLENT AGITATION OF THE GRINDING ELEMENTS IS PRODUCED IMMEDIATELY TO ITS REAR.
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) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |