Patent US2902525A successfully refreshed from Google Patents.
US2902525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for vaporisation of metals and metalloids
Assignee: Edwards High Vacuum Ltd
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Filing: 1957-02-12
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Granted: 1959-09-01
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Expires: 1977-02-12
Abstract
No abstract record available.
Inventors
- 👤 Barker Dennis Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:34
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/24; C23C14/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
APPARATUS FOR VACUUM VAPORISATION OF METALS AND METALLOIDS COMPRISING AN ELONGATED CARBON HEATER FOR AN EVAPORATOR WHICH CONSISTS OF BLOCK OF REFRACTORY MATERIAL HAVING SIX FLAT SIDES AND IN WHICH THE CARBON HEATER IS FORMED WITH A RECESS WITHIN WHICH SAID EVAPORATOR IS ACCOMMODATED IN SUCH A WAY THAT THE WALLS OF THE RECESS ARE SPACED FROM THE EVAPORATOR, SAID CARBON HEATER BEING HELD BY CLAMPING MEANS WHICH ALSO SERVE AS HEATING CURRENT CONVEYING ELECTRODES, SAID CLAMPING MEANS BEING ARRANGED TO PERMIT THE CARBON HEATER TO EXPAND AND BOW IN AN UPWARD OR DOWNWARD DIRECTION.
Claim 2
Dependent Claim
95 words
APPARATUS FOR VACUUM VAPORISATION OF METALS AND METALLOIDS COMPRISING AN ELONGATED CARBON HEATER FOR AN EVAPORATOR WHICH CONSISTS OF BLOCK OF REFRACTORY MATERIAL HAVING SIX FLAT SIDES AND IN WHICH THE CARBON HEATER IS FORMED WITH A RECESS WITHIN WHICH SAID EVAPORATOR IS ACCOMMODATED IN SUCH A WAY THAT THE WALLS OF THE RECESS ARE SPACED FROM THE EVAPORATOR, SAID CARBON HEATER BEING HELD BY CLAMPING MEANS WHICH ALSO SERVE AS HEATING CURRENT CONVEYING ELECTRODES, SAID CLAMPING MEANS BEING ARRANGED TO PERMIT THE CARBON HEATER TO EXPAND AND BOW IN AN UPWARD OR DOWNWARD DIRECTION.
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) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |