US3904130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mill for grinding minerals
Assignee: Omya AG
•
Filing: 1973-09-27
•
Granted: 1975-09-09
•
Expires: 1993-09-27
Abstract
Abstract Grinding elements containing 30 to 70% by weight of zirconium oxide, 0.1 to 5% by weight of aluminum oxide and 5 to 20% by weight of silicon oxide, process of grinding and mills containing the grinding elements.
Inventors
- 👤 Pierre Delfosse
- 👤 Alfred Bosshard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:24
CPC Classifications
C; C09; C09C; C09C3/00; C09C3/04; C09C3/041; C08; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/26; C09C1/00; C09C1/02; C09D; C09D7/00; C09D7/40; C09D7/60; C09D7/61; D; D21; D21H; D21H19/00; D21H19/36; D21H19/38; D21H19/385; D21H21/00; D21H21/50; D21H21/52; C01; C01P; C01P2004/00; C01P2004/51; C01P2004/60; C01P2004/61; C01P2004/62; C01P2006/00; C01P2006/12; C08K3/34
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
43 words
A MILL FOR GRINDING MINERALS FOR USE AS A PIGMENT OR FILLER, THE MILL HAVING GRINDING ELEMENTS COMPRISING 30 TO 70% BY WEIGHT OF ZIRCONIUM OXIDE 0.1 TO 5% BY WEIGHT OF ALUMINUM OXIDE AND 5 TO 20% BY WEIGHT OF SILICON OXIDE.
Claim 2
Dependent Claim
43 words
A MILL FOR GRINDING MINERALS FOR USE AS A PIGMENT OR FILLER, THE MILL HAVING GRINDING ELEMENTS COMPRISING 30 TO 70% BY WEIGHT OF ZIRCONIUM OXIDE 0.1 TO 5% BY WEIGHT OF ALUMINUM OXIDE AND 5 TO 20% BY WEIGHT OF SILICON OXIDE.
Claim 3
Dependent Claim
27 words
A mill according to claim 1 in the form of a ball mill, the grinding elements comprising balls having a diameter of from 0.5 to 10 cm.
Claim 4
Dependent Claim
27 words
A mill according to claim 1 in the form of a bead mill, the grinding elements comprising balls having a diameter of from 0.05 to 0.5 cm.
Claim 5
Dependent Claim
17 words
The mill of claim 1 wherein said grinding elements have a specific weight of 3.5 to 5.
Claim 6
Dependent Claim
19 words
The mill of claim 1 wherein said grinding elements comprise balls having a diameter of 0.1 to 0.25 cm.
Claim 7
Dependent Claim
44 words
A process for grinding of a material which comprises grinding said material in a mill having grinding elements comprising 30 to 70% by weight of zirconium oxide, 0.1 to 5% by weight of aluminum oxide and 5 to 20% by weight of siLicon oxide.
Claim 8
Dependent Claim
44 words
A process for grinding of a material which comprises grinding said material in a mill having grinding elements comprising 30 to 70% by weight of zirconium oxide, 0.1 to 5% by weight of aluminum oxide and 5 to 20% by weight of siLicon oxide.
Claim 9
Dependent Claim
20 words
The process of claim 6 wherein said grinding elements comprise balls having a diameter of from 0.5 to 10 cm.
Claim 10
Dependent Claim
13 words
The process of claim 7 wherein said material comprises coccolith shells or talc.
Claim 11
Dependent Claim
20 words
The process of claim 6 wherein said grinding elements comprise balls having a diameter of from 0.05 to 0.5 cm.
Claim 12
Dependent Claim
13 words
The process of claim 9 wherein said material comprises coccolith shells or talc.
Claim 13
Dependent Claim
16 words
The process of claim 6 wherein said grinding elements have specific weight of 3.5 to 5.
Claim 14
Dependent Claim
13 words
The process of claim 11 wherein said material comprises coccolith shells or talc.
Claim 15
Dependent Claim
19 words
The process of claim 6 wherein said grinding elements comprise balls having a diameter of 0.1 to 0.25 cm.
Claim 16
Dependent Claim
13 words
The process of claim 13 wherein said material comprises coccolith shells or talc.
Claim 17
Dependent Claim
13 words
The process of claim 6 wherein said material comprises coccolith shells or talc.
Claim 18
Dependent Claim
12 words
A ground material when produced by a process in accordance claim 15.
Claim 19
Dependent Claim
34 words
Grinding element for grinding minerals in a mill comprising 30 to 70% by weight of zirconium oxide, 0.1 to 5% by weight of aluminum oxide and 5 to 20% by weight of silicon oxide.
Claim 20
Dependent Claim
34 words
Grinding element for grinding minerals in a mill comprising 30 to 70% by weight of zirconium oxide, 0.1 to 5% by weight of aluminum oxide and 5 to 20% by weight of silicon oxide.
Claim 21
Dependent Claim
17 words
The grinding element of claim 17 comprising balls having a diameter of from 0.5 to 10 cm.
Claim 22
Dependent Claim
17 words
The grinding element of claim 17 comprising balls having a diameter of from 0.05 to 0.5 cm.
Claim 23
Dependent Claim
17 words
The grinding element of claim 17 which comprises balls having a diameter of 0.1 to 0.25 cm.
References Cited (Backward Citations)
US2316043A
Cited
US2332701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |