Patent US5325862A successfully refreshed from Google Patents.
US3558445A
Expired / Lapsed
US
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Method of producing coatings on hard metal bodies
Assignee: Fried Krupp AG
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Filing: 1967-05-26
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Granted: 1971-01-26
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Expires: 1987-05-26
Abstract
Abstract A SOLID SOLUTION LAYER OF ONE OR MORE OF THE METALS TITANIUM, VANADIUM, TANTALUM, OR COLUMBIUM, OR THEIR CARBIDES, IS FORMED ON THE SURFACE OF A HARD METAL BODY, SUCH AS TUNGSTEN CARBIDE, BY HEATING THE HARD METAL BODY IN CONTACT WITH THE COATING METAL, OR AN ALLOY, OR A READILY DECOMPOSABLE COMPOUND THEREOF, AT A TEMPERATURE ABOVE ABOUT 900*C., OR BY ELECTROLYTIC DEPOSITION, FOLLOWED BY HEATING.
Inventors
- 👤 Walter Rix
- 👤 Grete Dix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:00
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/14; C23C14/16; C23C14/58; C23C14/5806; C23C14/5893; C23C16/00; C23C16/06; C23C26/00; C23C30/00; C23C30/005
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |