Patent US3709809A successfully refreshed from Google Patents.
US3709809A
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US
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Sputter deposition of refractory carbide on metal working
Assignee: Dow Chemical Co
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Filing: 1971-07-15
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Granted: 1973-01-09
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Expires: 1991-07-15
Abstract
Abstract A METHOD OF COATING METALWORKING TOOLS WITH A THIN UNIFORM ADHERENT LAYER OF REFRACTORY CARBIDE, E.G., TITANIUM CARBIDE, IS DISCLOSED. SUCH COATING IS APPLIED BY TRIODE SPUTTER DEPOSITION USING A REFRACTORY CARBIDE CATHODE AND A TOOL SUBSTRATE.
Inventors
- 👤 R Wright
- 👤 J Chapin
- 👤 G Mah
- 👤 C Karstendiek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:21
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/0635; 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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |