US5032203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for polishing
Assignee: Tosoh Silica Corp
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Filing: 1989-01-04
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Granted: 1991-07-16
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Expires: 2009-01-04
Abstract
Abstract Polishing agent including as a main constituent an aqueous solution containing sodium bromite. The aqueous solution may further contain particles which are not dissolved in the solution or an alkali agent to adjust the pH to 8 to 14. Also the apparatus and method for polishing articles using the polishing agent are disclosed.
Inventors
- 👤 Toshiroh K. Doy
- 👤 Hiroshi Nakada
- 👤 Yoshihiko Kunimitsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:05
CPC Classifications
H; H10; H10P; H10P90/00; H10P90/12; H10P90/129; B; B24; B24B; B24B37/00; B24B37/04; B24B57/00; B24B57/02; C; C09; C09K; C09K3/00; C09K3/14; C09K3/1454; C09K3/1463
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A polishing apparatus for polishing hard and fragile materials, comprising: a polisher having a polishing surface on which the material to be polished is placed, a conditioning rotatable ring slidably supported on the polishing surface and arranged to loosely hold the material to be polished, a metal piece disposed on said conditioning ring so as to contact a polishing surface, a vessel containing a polishing agent comprising an aqueous solution of sodium bromite, said vessel being arranged to drop the polishing agent onto the polishing surface and bring it into contact with the metal piece so as to decompose the sodium bromite and generate bromine.
Claim 2
Dependent Claim
105 words
A polishing apparatus for polishing hard and fragile materials, comprising: a polisher having a polishing surface on which the material to be polished is placed, a conditioning rotatable ring slidably supported on the polishing surface and arranged to loosely hold the material to be polished, a metal piece disposed on said conditioning ring so as to contact a polishing surface, a vessel containing a polishing agent comprising an aqueous solution of sodium bromite, said vessel being arranged to drop the polishing agent onto the polishing surface and bring it into contact with the metal piece so as to decompose the sodium bromite and generate bromine.
References Cited (Backward Citations)
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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) | 1994-07-15 | 1995-01-14 | 1995-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-15 | 1999-01-14 | 1999-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-15 | 2003-01-14 | 2003-07-16 | $7700.00 | Window Closed / Lapsed |