US3816491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hexamethyltungsten
Assignee: EIDP Inc
•
Filing: 1973-02-02
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Granted: 1974-06-11
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Expires: 1993-02-02
Abstract
Abstract HEXAMETHYLTUNGSTEN IS A RED CRYSTALLINE SOLID WHICH IS EXTREMELY VOLATILE. IN THE ABSENCE OF AIR AT ABOUT 50*C. IT DECOMPOSES RAPIDLY TO YIELD METALLIC TUNGSTEN. IT IS THEREFORE USEFUL AS A METALLIZING AGENT FOR MATERIALS WHICH ARE SENSITIVE TO HIGHER AND MORE CONVENTIONAL METALLIZING TEMPERATURES.
Inventors
- 👤 G Wilkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:51
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/06; C23C16/18; C07; C07F; C07F11/00
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |