US4420346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing contacts and electrodes of electric vacuum apparatuses
Assignee: Individual
•
Filing: 1980-11-28
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Granted: 1983-12-13
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Expires: 2000-11-28
Abstract
Abstract A method of preparing contacts and electrodes of electric vacuum apparatuses comprising the steps of exposing the contact (electrode) surface to a concentrated thermal flux of 10 4 to 10 6 W/cm 2 in a vacuum or in the environment of an inert gas for 21 to 100 ms and subjecting said surface to subsequent cooling at a cooling rate ranging from 10 4 to 10 6 K/s.
Inventors
- 👤 German S. Belkin
- 👤 Stal N. Voskresensky
- 👤 Viktor Y. Kiselev
- 👤 Ida A. Lukatskaya
- 👤 Valery V. Rodionov
- 👤 Mikhail N. Skurikhin
- 👤 Irina B. Frolova
- 👤 Vyacheslav S. Zuev
- 👤 Lev I. Kornevv
- 👤 Rauza A. Chervonenkis
- 👤 Efim M. Rabinovich
- 👤 Tatyana P. Volkova
- 👤 German A. Goryaev
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:49
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/24; H; H01; H01H; H01H1/00; H01H1/02; H01H1/0203; H01H2001/0205
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A method of preparing contacts and electrodes of electric vacuum apparatuses comprising the steps of exposing the surface of the contacts (electrodes) to a concentrated thermal flux of 10 4 to 10 6 W/cm 2 in a vacuum or in the atmosphere of an inert gas and subjecting said surface to subsequent cooling, said concentrated thermal flux is applied for 21 to 100 ms and a rate of cooling during the cooling step is chosen to be within the range 10 4 to 10 6 K/s.
Claim 2
Independent Claim
86 words
A method of preparing contacts and electrodes of electric vacuum apparatuses comprising the steps of exposing the surface of the contacts (electrodes) to a concentrated thermal flux of 10 4 to 10 6 W/cm 2 in a vacuum or in the atmosphere of an inert gas and subjecting said surface to subsequent cooling, said concentrated thermal flux is applied for 21 to 100 ms and a rate of cooling during the cooling step is chosen to be within the range 10 4 to 10 6 K/s.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-12 | 1987-06-13 | 1987-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-12 | 1991-06-13 | 1991-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-12 | 1995-06-13 | 1995-12-13 | $7700.00 | Window Closed / Lapsed |