US5090969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated abrasive grains and a manufacturing method therefor
Assignee: Noritake Co Ltd
•
Filing: 1989-10-23
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Granted: 1992-02-25
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Expires: 2009-10-23
Abstract
Abstract Coated abrasive grains and a manufacturing method for them are disclosed. The abrasive grains are coated using an immersion method with a coating comprising at least one substance selected from carbides, borides, and nitrides of a metal, comprising: preparing an immersion bath comprising a molten salt bath containing said metal; and immersing abrasive grains to be treated in said immersion bath for a suitable length of time.
Inventors
- 👤 Takeo Oki
- 👤 Yoichi Fukuta
- 👤 Eiichi Hisada
- 👤 Satoshi Aoki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:23
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/5053; C04B41/52; C04B41/80; C04B41/81; C04B41/85; C04B41/87; C04B41/89; C09; C09K; C09K3/00; C09K3/14; C09K3/1436; C09K3/1445
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
41 words
Coated abrasive grains comprising abrasive grains whose surfaces are coated with a coating comprising at least one substance selected from carbides, borides, and nitrides of a metal, said coating being applied by an immersion method using a fluoride-containing molten salt bath.
Claim 2
Dependent Claim
41 words
Coated abrasive grains comprising abrasive grains whose surfaces are coated with a coating comprising at least one substance selected from carbides, borides, and nitrides of a metal, said coating being applied by an immersion method using a fluoride-containing molten salt bath.
Claim 3
Dependent Claim
24 words
Coated abrasive grains as defined in claim 1, wherein said abrasive grains which are coated are diamond abrasive grains or hard BN abrasive grains.
Claim 4
Dependent Claim
38 words
Coated abrasive grains as defined in claim 1, wherein the carbides, borides, and nitrides are of at least one metal selected from the group consisting of the numbers of Group IVa, Va, and VIa of the periodic table.
Claim 5
Dependent Claim
38 words
Coated abrasive grains as defined in claim 1, wherein the carbides, borides, and nitrides are of at least one metal selected from the group consisting of Si, Cv, V, B, W, Mo, Ti, Zr, Hf, Nb and Ta.
Claim 6
Dependent Claim
24 words
Coated abrasive grains as defined in claim 3, wherein said abrasive grains which are coated are diamond abrasive grains or hard BN abrasive grains.
Claim 7
Dependent Claim
24 words
Coated abrasive grains as defined in claim 4, wherein said abrasive grains which are coated are diamond abrasive grains or hard BN abrasive grains.
Claim 8
Dependent Claim
42 words
Coated abrasive grains as defined in claim 1, wherein said immersion method comprises preparing an immersion bath comprising a molten salt bath containing said metal, and immersing abrasive grains to be treated in said immersion bath for a suitable length of time.
Claim 9
Dependent Claim
42 words
Coated abrasive grains as defined in claim 2, wherein said immersion method comprises preparing an immersion bath comprising a molten salt bath containing said metal, and immersing abrasive grains to be treated in said immersion bath for a suitable length of time.
Claim 10
Dependent Claim
42 words
Coated abrasive grains as defined in claim 3, wherein said immersion method comprises preparing an immersion bath comprising a molten salt bath containing said metal, and immersing abrasive grains to be treated in said immersion bath for a suitable length of time.
Claim 11
Dependent Claim
42 words
Coated abrasive grains as defined in claim 4, wherein said immersion method comprises preparing an immersion bath comprising a molten salt bath containing said metal, and immersing abrasive grains to be treated in said immersion bath for a suitable length of time.
Claim 12
Dependent Claim
32 words
Coated abrasive grains as defined in claim 1, wherein the fluoride-containing molten salt bath is a KCl--BaCl 2 --NaF bath, and the proportion of fluoride is not more than 50 mol %.
Claim 13
Dependent Claim
48 words
Coated abrasive grains comprising abrasive grains whose surfaces are coated with a coating comprising at least one substance selected from carbides, borides, and nitrides of a metal, said coating having been formed by a chemical reaction between the surface of the abrasive grains and a molten salt bath.
Claim 14
Dependent Claim
48 words
Coated abrasive grains comprising abrasive grains whose surfaces are coated with a coating comprising at least one substance selected from carbides, borides, and nitrides of a metal, said coating having been formed by a chemical reaction between the surface of the abrasive grains and a molten salt bath.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-02-24 | 1995-08-26 | 1996-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-24 | 1999-08-26 | 2000-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-24 | 2003-08-26 | 2004-02-25 | $7700.00 | Window Closed / Lapsed |