US3741733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sintered hard alloy and method of making
Assignee: Ugine Carbone
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Filing: 1970-09-29
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Granted: 1973-06-26
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Expires: 1990-09-29
Abstract
Abstract A SINISTER HARD METAL ALLOW USEFUL AS A CUTTING TOOL BIT AND PROCESS OF MAKING SAME COMPRISING A METALLIC HARD MATERIAL PHASE HAVING A NITROGEN BASE AND COMPRISING NITRIDES OR NITRIDE-CARBIDE MIXTURES OR CARBONITRIDES OR MIXTURES THEREOF, PREFERABLY WITH METALS OF THE TRANSITION METAL GROUPS IVA AND VA OF THE PERIODIC TABLE. THE HARD MATERIAL PHASE IS BONDED BY A AUXILIARY ALLOY PHASE COMPRISING A MIXTURE OF METALS FROM THE IRON GROUP METALS AND FROM THE CHROMIUM GROUP METALS.
Inventors
- 👤 R Kieffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:53
CPC Classifications
C; C22; C22C; C22C29/00; C22C29/02; C22C29/04; C22C1/00; C22C1/04; C22C1/05; C22C1/051; C22C29/16; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/932; Y10T; Y10T428/00; Y10T428/12; Y10T428/12007
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) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |