Patent US4456500A successfully refreshed from Google Patents.
US4456500A
Expired / Lapsed
US
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Method of manufacturing a polisher
Assignee: Nippon Tenshashi KK
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Filing: 1982-07-28
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Granted: 1984-06-26
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Expires: 2002-07-28
Abstract
Abstract In a method of making a polishing element a photoresist film 2 is first deposited on a surface of metal stock 1. A photomask 3 is then used to selectively cover portions of the deposited photoresist film 2. Thereafter, portions of the photoresist film 2 which are not covered by the photomask 3 are removed in order to leave exposed patterned portions 5 of the metal stock surface. Gulf-shaped recesses 6 are then etched into the exposed portions of the metal stock surface. The formation of gulf-shaped recesses 6 results from the application of a etchant while the metal stock 1 and the etchant are in physical motion relative to one another. After etching, remaining portions of the photoresist film 2 are removed from the metal stock. A polishing element 10 comprising cutting teeth 11 having acute cutting action angles results.
Inventors
- 👤 Sachiko Ibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:39
CPC Classifications
B; B24; B24D; B24D99/00; B23; B23D; B23D73/00; B23D73/04; B24D18/00; C; C23; C23F; C23F1/00; C23F1/02; C23F1/04; B24D2203/00; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/932; Y10T; Y10T428/00; Y10T428/12; Y10T428/12201; Y10T428/12208; Y10T428/12993
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
149 words
A method of making a polishing element comprising the steps of: depositing a photoresist film on a coarse surface of metal stock; using a photomask to selectively cover portions of said photoresist film; removing portions of said photoresist film thereby leaving portions of said metal stock coarse surface uncovered, etching recesses in said uncovered portions of said metal stock coarse surface by applying an etchant while said metal stock and said etchant are in physical motion relative to each other, thereby forming cutting teeth having teeth tops lying essentially in the plane of said metal stock coarse surface and teeth sides which at least partially define said recess, the interior angle between said teeth top and teeth side being an acute angle; removing remaining portions of said photoresist film from said metal stock; and, hardening said coarse surface of said metal stock on which said cutting teeth are formed.
Claim 2
Independent Claim
149 words
A method of making a polishing element comprising the steps of: depositing a photoresist film on a coarse surface of metal stock; using a photomask to selectively cover portions of said photoresist film; removing portions of said photoresist film thereby leaving portions of said metal stock coarse surface uncovered, etching recesses in said uncovered portions of said metal stock coarse surface by applying an etchant while said metal stock and said etchant are in physical motion relative to each other, thereby forming cutting teeth having teeth tops lying essentially in the plane of said metal stock coarse surface and teeth sides which at least partially define said recess, the interior angle between said teeth top and teeth side being an acute angle; removing remaining portions of said photoresist film from said metal stock; and, hardening said coarse surface of said metal stock on which said cutting teeth are formed.
Claim 3
Dependent Claim
24 words
The method of claim 1 wherein said interior angle between said teeth top and teeth side is in the range of 40° to 70°.
Claim 4
Dependent Claim
17 words
The method of claim 2 further comprising the step of securing the polishing element to a holder.
Claim 5
Dependent Claim
20 words
The method of claim 1 further comprising the step of: bending said metal stock in conformity to a desired shape.
Claim 6
Dependent Claim
17 words
The method of claim 1 further comprising the step of securing the polishing element to a holder.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-26 | 1987-12-26 | 1988-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-26 | 1991-12-26 | 1992-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-26 | 1995-12-26 | 1996-06-26 | $7700.00 | Window Closed / Lapsed |