US3955038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hard metal body
Assignee: Sandvik AB
•
Filing: 1973-04-09
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Granted: 1976-05-04
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Expires: 1993-04-09
Abstract
Abstract A sintered hard metal body is provided with a thin wear-resistant surface coating consisting of an outer layer of ceramic oxide and an intermediate layer of carbide or/and nitride.
Inventors
- 👤 Jan Nils Lindstrom
- 👤 Bo Folke Jonsson
- 👤 Fall Johan Olof William Ohlsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:36
CPC Classifications
C; C23; C23C; C23C30/00; C23C30/005; C22; C22C; C22C29/00; C23C16/00; C23C16/22; C23C16/30; C23C16/32; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/925; Y10S428/926; Y10T; Y10T407/00; Y10T407/27; Y10T428/00; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
38 words
An article consisting of 1. a substrate body of sintered cemented metal carbide containing a small quantity of binder metal; 2. an intermediate layer of metal selected from the group consisting of metal carbides and metal nitrides; and
Claim 2
Dependent Claim
38 words
An article consisting of 1. a substrate body of sintered cemented metal carbide containing a small quantity of binder metal; 2. an intermediate layer of metal selected from the group consisting of metal carbides and metal nitrides; and
Claim 3
Dependent Claim
41 words
a thin wear-resistant surface coating consisting essentially of at least one layer of wear-resistant ceramic oxide, the thickness of said surface coating being 0.5- 4.0 μm, and the thickness of said intermediate layer being 2-16 times that of said surface coating.
Claim 4
Dependent Claim
41 words
a thin wear-resistant surface coating consisting essentially of at least one layer of wear-resistant ceramic oxide, the thickness of said surface coating being 0.5- 4.0 μm, and the thickness of said intermediate layer being 2-16 times that of said surface coating.
Claim 5
Dependent Claim
25 words
An article as defined in claim 1 in which the sum of the thickness of the intermediate layer and the surface coating is 3-11 μm.
References Cited (Backward Citations)
US2872350A
Cited
US2994124A
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US3249460A
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US3260579A
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US3313605A
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US3719519A
Cited
US3721577A
Cited
US3475161A
Cited
US3640689A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-04 | 1979-11-03 | 1980-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-04 | 1983-11-03 | 1984-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-04 | 1987-11-03 | 1988-05-04 | $7700.00 | Window Closed / Lapsed |