US5114437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polishing composition for metallic material
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1991-08-27
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Granted: 1992-05-19
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Expires: 2011-08-27
Abstract
Abstract A polishing composition for metallic materials, which comprises water, an alumina polishing agent, and a polishing accelerator, wherein the polishing accelerator is at least one selected from the group consisting of chromium(III) nitrate, lanthanum nitrate, ammonium cerium(III) nitrate, and neodymium nitrate. The polishing composition has a high polishing efficiency and provides a good surface smoothness.
Inventors
- 👤 Yoshiaki Takeuchi
- 👤 Koji Yamamoto
- 👤 Hiroshi Umezaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:43
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/34; B24D3/346; C; C09; C09G; C09G1/00; C09G1/02; C09K; C09K3/00; C09K3/14; C09K3/1454; C09K3/1463; C23; C23F; C23F3/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
42 words
A polishing composition for metallic materials, said composition comprising water, an alumina polishing agent, and a polishing accelerator, wherein said polishing accelerator is at least one selected from the group consisting of chromium(III) nitrate, lanthanum nitrate, ammonium cerium(III) nitrate, and neodymium nitrate.
Claim 2
Dependent Claim
42 words
A polishing composition for metallic materials, said composition comprising water, an alumina polishing agent, and a polishing accelerator, wherein said polishing accelerator is at least one selected from the group consisting of chromium(III) nitrate, lanthanum nitrate, ammonium cerium(III) nitrate, and neodymium nitrate.
Claim 3
Dependent Claim
24 words
A polishing composition as claimed in claim 1, wherein the content of said polishing accelerator is from about 0.3 to about 10% by weight.
Claim 4
Dependent Claim
24 words
A polishing composition as claimed in claim 2, wherein the content of said polishing accelerator is from about 0.5 to about 5% by weight.
Claim 5
Dependent Claim
25 words
A polishing composition as claimed in claim 1, wherein the content of said alumina polishing agent is from about 1 to about 30% by weight.
Claim 6
Dependent Claim
25 words
A polishing composition as claimed in claim 4, wherein the content of said alumina polishing agent is from about 2 to about 25% by weight.
Claim 7
Dependent Claim
26 words
A polishing composition as claimed in claim 1, wherein the average particle size of said alumina polishing agent is from about 0.2 to about 5 μm.
Claim 8
Dependent Claim
26 words
A polishing composition as claimed in claim 6, wherein the average particle size of said alumina polishing agent is from about 0.3 to about 3 μm.
References Cited (Backward Citations)
US4529410A
Cited
US4601755A
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US4696697A
Cited
US4769046A
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US4929257A
Cited
US4935039A
Cited
US4915710A
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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) | 1995-05-19 | 1995-11-18 | 1996-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-19 | 1999-11-18 | 2000-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-19 | 2003-11-18 | 2004-05-19 | $7700.00 | Window Closed / Lapsed |