Patent US3920407A successfully refreshed from Google Patents.
US3920407A
Expired / Lapsed
US
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Ruthenium or osmium on hard metals
Assignee: Huntington Alloys Corp
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Filing: 1973-12-26
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Granted: 1975-11-18
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Expires: 1993-12-26
Abstract
Abstract The life of cutting tools is increased by providing on the cutting surface thereof a deposited layer of osmium, ruthenium or an alloy of osmium and ruthenium.
Inventors
- 👤 Brian Arthur Mynard
- 👤 Bryan Jones
- 👤 Victor Allen Tracey
- 👤 Walter Betteridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:30
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/50; C22; C22C; C22C29/00; C23; C23C; C23C30/00; C23C30/005; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10S428/9265; Y10S428/932; Y10T; Y10T428/00; Y10T428/12; Y10T428/12007; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12931
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
30 words
A CUTTING TOOL HAVING DEPOSITED. AT LEAST ONE A PORTION OF THE SURFACE THEREOF, A LAYER OF METAL FROM THE GROUP OF OSMIUM AND RUTHENIUM AND MIXTURES AND ALLOYS THEROF.
Claim 2
Dependent Claim
30 words
A CUTTING TOOL HAVING DEPOSITED. AT LEAST ONE A PORTION OF THE SURFACE THEREOF, A LAYER OF METAL FROM THE GROUP OF OSMIUM AND RUTHENIUM AND MIXTURES AND ALLOYS THEROF.
Claim 3
Dependent Claim
24 words
A cutting tool as in claim 1 in which the surface layer is an electrolytic deposit and is from 2 to 10 microns thick.
Claim 4
Dependent Claim
14 words
A cutting tool as in claim 2 comprising a base of cobalt-bonded, sintered carbide.
Claim 5
Dependent Claim
13 words
A cutting tool as in claim 2 comprising a base of high-speed steel.
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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |