Patent US4609381A successfully refreshed from Google Patents.
US4609381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding aid
Assignee: Saint Gobain Abrasives Inc
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Filing: 1984-12-13
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Granted: 1986-09-02
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Expires: 2004-12-13
Abstract
Abstract This invention relates to organically bonded abrasive articles that include grinding aids. It has been determined that when known grinding aids such as alkali metal sulphates and alkali metal chlorides are cofused in about eutectic proportions and added to thermoset resin bonded abrasive articles in the form of finely crushed particles having an approximate eutectic composition that an improved abrasive article results.
Inventors
- 👤 Kesh S. Narayanan
- 👤 Suresh S. Vagarali
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:21
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/34; B24D3/346; B24D3/342; B24D3/344
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
56 words
An abrasive article comprising abrasive grain and a bonding material, said bonding material being a thermoset binder resin and said article including a grinding aid filler, said filler consisting of a cofused near eutectic mix of an alkali metal sulphate and an alkali metal chloride, said mix being crushed prior to being included in said mix.
Claim 2
Dependent Claim
56 words
An abrasive article comprising abrasive grain and a bonding material, said bonding material being a thermoset binder resin and said article including a grinding aid filler, said filler consisting of a cofused near eutectic mix of an alkali metal sulphate and an alkali metal chloride, said mix being crushed prior to being included in said mix.
Claim 3
Dependent Claim
15 words
An abrasive article as in claim 1 wherein said alkali metal sulphate is potassium sulphate.
Claim 4
Dependent Claim
15 words
An abrasive article as in claim 1 wherein said alkali metal chloride is sodium chloride.
Claim 5
Dependent Claim
15 words
An abrasive article as in claim 2 wherein said alkali metal chloride is sodium chloride.
Claim 6
Dependent Claim
31 words
An abrasive article as in claim 4 wherein said alkali metal sulphate is present in about 60% by weight and said alkali metal chloride is present in about 40% by weight.
Claim 7
Dependent Claim
22 words
An abrasive article as in claim 1 wherein said mix is crushed to all pass through a 200 mesh U.S. Standard screen.
Claim 8
Dependent Claim
51 words
A bonded abrasive article comprising an organic bond for abrasive grains and including a grinding aid filler, said filler consisting of a cofused and crushed mixture of an alkali metal sulphate and an alkali metal chloride, said respective alkali metal salts being present in said mixture in a near eutectic proportion.
Claim 9
Dependent Claim
51 words
A bonded abrasive article comprising an organic bond for abrasive grains and including a grinding aid filler, said filler consisting of a cofused and crushed mixture of an alkali metal sulphate and an alkali metal chloride, said respective alkali metal salts being present in said mixture in a near eutectic proportion.
Claim 10
Dependent Claim
40 words
An abrasive article as in claim 7 wherein said alkali metal sulfate is potassium sulphate present in about 60% by weight of said mixture, and alkali metal chloride is sodium chloride present in about 40% by weight of said mixture.
Claim 11
Dependent Claim
53 words
A raw batch for making an abrasive grinding article comprising a resin bond formula adapted to be thermoset, abrasive grain, and filler material, certain of said filler material consisting of a near eutectic composition made of an alkali metal sulphate and an alkali metal chloride, said composition being a cofused and crushed composition.
Claim 12
Dependent Claim
53 words
A raw batch for making an abrasive grinding article comprising a resin bond formula adapted to be thermoset, abrasive grain, and filler material, certain of said filler material consisting of a near eutectic composition made of an alkali metal sulphate and an alkali metal chloride, said composition being a cofused and crushed composition.
Claim 13
Dependent Claim
21 words
A raw batch as in claim 9 wherein said composition is crushed to pass through a 200 mesh U.S. Standard screen.
Claim 14
Dependent Claim
34 words
A raw batch as in claim 9 wherein said alkali metal sulphate is present in said composition in about 60% by weight and said alkali metal chloride is present in about 40% by weight.
Claim 15
Independent Claim
53 words
A method of grinding metal with an organically bonded abrasive grinding wheel comprising driving the thermoset resin supported abrasive against the metal being ground in the presence of a grinding aid consisting at least in part of a cofused crushed nearly eutectic composition of an alkali metal sulphate and an alkali metal chloride.
Claim 16
Independent Claim
53 words
A method of grinding metal with an organically bonded abrasive grinding wheel comprising driving the thermoset resin supported abrasive against the metal being ground in the presence of a grinding aid consisting at least in part of a cofused crushed nearly eutectic composition of an alkali metal sulphate and an alkali metal chloride.
Claim 17
Dependent Claim
14 words
A method as in claim 12 wherein the alkali metal sulphate is potassium sulphate.
Claim 18
Dependent Claim
14 words
A method as in claim 12 wherein the alkali metal chloride is sodium chloride.
Claim 19
Dependent Claim
14 words
A method as in claim 13 wherein the alkali metal chloride is sodium chloride.
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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) | 1989-09-01 | 1990-03-03 | 1990-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-01 | 1994-03-03 | 1994-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-01 | 1998-03-03 | 1998-09-02 | $7700.00 | Window Closed / Lapsed |