US2979811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cemented carbide body having wettable surface and method of producing same
Assignee: National Twist Drill and Tool Co
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Filing: 1958-10-24
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Granted: 1961-04-18
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Expires: 1978-10-24
Abstract
No abstract record available.
Inventors
- 👤 Lawrence B Toney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:08
CPC Classifications
C; C23; C23C; C23C30/00; C23C30/005; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12139; Y10T428/12493; Y10T428/12639; Y10T428/12646; Y10T428/12771; Y10T428/12861
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
50 words
A COBALT CEMENTED CARBIDE BODY COMPOSED ESSENTIALLY OF ONE OR MORE METALLIC CARBIDES SELECTED FROM THE GROUP CONSISTING OF TUNGSTEN CARBIDE, TITANIUM CARBIDE AND TANTALUM CARBIDE, AND A COBALT BINDER FOR SAID CARBIDES, IN WHICH SOME OF ITS BINDER MATERIAL HAS MIGRATED TO THE SURFACE PORTION TO PROVIDE A SURFACE
References Cited (Backward Citations)
US2176802A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |