Patent US4565034A successfully refreshed from Google Patents.
US4565034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding and/or cutting endless belt
Assignee: Disco Corp
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Filing: 1984-01-03
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Granted: 1986-01-21
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Expires: 2004-01-03
Abstract
Abstract For adaptation to grinding or cutting precise or minute parts, a grinding and/or cutting endless belt is made of grindstone comprising electrodeposited abrasive grains.
Inventors
- 👤 Shinji Sekiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:40
CPC Classifications
B; B24; B24D; B24D11/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
104 words
An endless belt made of grindstone comprising a plurality of layers of electrodeposited abrasive grains and being provided with no base material for supporting said layers, the grindstone consists of a plurality of parts, each of which comprises a plurality of layers of electrodeposited abrasive grains and the grain sizes of which are different from one another, wherein said parts of said grindstone are laminated stepwise with one another so that the width of the upper part is smaller than that of the lower part and the lower part is partially exposed out of at least one side end portion of the upper part.
Claim 2
Dependent Claim
104 words
An endless belt made of grindstone comprising a plurality of layers of electrodeposited abrasive grains and being provided with no base material for supporting said layers, the grindstone consists of a plurality of parts, each of which comprises a plurality of layers of electrodeposited abrasive grains and the grain sizes of which are different from one another, wherein said parts of said grindstone are laminated stepwise with one another so that the width of the upper part is smaller than that of the lower part and the lower part is partially exposed out of at least one side end portion of the upper part.
Claim 3
Dependent Claim
23 words
An endless belt according to claim 1, wherein the grain size of the upper part is smaller than that of the lower part.
Claim 4
Dependent Claim
48 words
An endless belt according to claim 2, wherein said grindstone consists of three parts, the lowermost part having the grain size of #600 to 1500, the intermediate part having the grain size of #1000 to 4000 and the uppermost part having the grain size of #2000 to 8000.
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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) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |