US3171192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Article and method of fabricating same
Assignee: Vitro Corp of America
•
Filing: 1961-09-22
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Granted: 1965-03-02
•
Expires: 1981-09-22
Abstract
No abstract record available.
Inventors
- 👤 Martin H Ortner
- 👤 Stanley J Klach
- 👤 Kenneth A Gebler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:30
CPC Classifications
B; B22; B22F; B22F7/00; B22F7/06; B22F7/08; B22F5/00; B22F2005/001; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10S428/9265; Y10S428/932; Y10S428/9335; Y10S428/934; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12139; Y10T428/12229; Y10T428/12271; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12812; Y10T428/12826; Y10T428/1284
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A METHOD OF FABRICATING CUTTING TOOLS HAVING A CORE OF A METAL WHICH RETAINS ITS SHAPE AT TEMPERATURES ABOVE 1000*C. AND A SURFACE COATING OF CEMENTED CARBIDE STRONGLY BONDED THERETO, COMPRISING THE STEPS OF PROVIDING A CORE MEMBER OF SAID METAL HAVING A CARBIDE-FREE SURFACE, DEPOSITING ON THE CARBIDE-FREE SURFACE OF THE CORE MEMBER A UNIFORM THIN COATING OF A POWDERED MIXTURE OF A CARBIDE AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF METALS OF THE IRON GROUP AND THEIR REDUCIBLE COMPOUNDS, AND SINTERING THE POWDERED MIXTURE WHILE MAINTAINING IT IN CONTACT WITH THE SURFACE OF THE CORE MEMBER FOR A TIME SUFFICIENT TO DEVELOP A DIFFUSION ZONE BETWEEN THE CARBIDE COATING AND THE CORE MEMBER.
Claim 2
Independent Claim
117 words
A METHOD OF FABRICATING CUTTING TOOLS HAVING A CORE OF A METAL WHICH RETAINS ITS SHAPE AT TEMPERATURES ABOVE 1000*C. AND A SURFACE COATING OF CEMENTED CARBIDE STRONGLY BONDED THERETO, COMPRISING THE STEPS OF PROVIDING A CORE MEMBER OF SAID METAL HAVING A CARBIDE-FREE SURFACE, DEPOSITING ON THE CARBIDE-FREE SURFACE OF THE CORE MEMBER A UNIFORM THIN COATING OF A POWDERED MIXTURE OF A CARBIDE AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF METALS OF THE IRON GROUP AND THEIR REDUCIBLE COMPOUNDS, AND SINTERING THE POWDERED MIXTURE WHILE MAINTAINING IT IN CONTACT WITH THE SURFACE OF THE CORE MEMBER FOR A TIME SUFFICIENT TO DEVELOP A DIFFUSION ZONE BETWEEN THE CARBIDE COATING AND THE CORE MEMBER.
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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) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |