US3625666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming metal-coated diamond abrasive wheels
Assignee: Industrial Distributors 1946 Ltd
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Filing: 1969-06-16
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Granted: 1971-12-07
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Expires: 1989-06-16
Abstract
Abstract THE WORKING ZONE OF AN ABRASIVE TOOL IS FORMED FROM NICKEL-COATED DIAMOND PARTICLES AND A RUNNY EPOXY RESIN. THE MIXTURE OF DIAMONDS AND RESIN ARE CHARGED INTO A MOULD. SETTLING OUT OF DIAMOND PARTICLES IS PREVENTED AND THE DISTRIBUTIONOF THE PARTICLES IN THE RUNNY RESIN IS CONTROLLED BY APPLYING A MAGNETIC FIELD OR AN ELECTROSTATIC FIELD ACROSS THE MOULD. THE DIRECTION OF THE LINES OF FIELD FORCE IS CHOSEN TO BE NORMAL TO THE EVENTUAL WORKING FACE SO THAT ELONGATED PARTICLES TEND TO ALIGN THEMSELVES AXIALLY ALONG LINES OF FORCE. D R A W I N G
Inventors
- 👤 George S James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:41
CPC Classifications
B; B24; B24D; B24D18/00; C; C09; C09K; C09K3/00; C09K3/14; C09K3/1436; C09K3/1445
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |