US3235480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermionic evaporation rate controller
Assignee: Electra Manufacturing Co
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Filing: 1963-04-08
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Granted: 1966-02-15
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Expires: 1983-04-08
Abstract
No abstract record available.
Inventors
- 👤 Gaylord A Swartz
- 👤 Bobby G Milks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:29
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/54; C23C14/542; C23C14/544; H; H01; H01C; H01C17/00; H01C17/06; H01C17/075; H01C17/08; H01J; H01J37/00; H01J37/32; H01J37/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN A THERMIONIC EVAPORATION RATE CONTROLLER FOR EVAPORATING METAL TO FORM FILM TYPE RESISTORS OR THE LIKE, THE COMBINATION WHICH COMPRISES, AN EVAPORATION CHAMBER AND MEANS FOR EVACUATING SAID CHAMBER, A FILAMENT WITHIN SAID EVAPORATION CHAMBER FOR CONTROLLING THE RATE OF EVAPORATION, A VARIABLE POWER SUPPLY ASSOCIATED WITH THE FILAMENT FOR SUPPLYING CURRENT THERETO, AN ANODE ASSOCIATED WITH THE FILAMENT, A DIRECT VOLTAGE SOURCE CONNECTED BETWEEN THE ANODE AND THE FILAMENT SO THAT THERMIONIC CURRENT FLOWS FROM THE FILAMENT TO THE ANODE, AND MEANS RESPONSIVE TO THE MAGNITUDE OF THERMIONIC CURRENT FLOW FOR CONTROLLING THE VARIABLE POWER SUPPLY TO VARY THE CURRENT SUPPLIED TO THE FILAMENT SO THAT THE FILAMENT TEMPERATURE IS MAINTAINED AT SUBSTANTIALLY A CONSTANT DESIRED LEVEL.
Claim 2
Dependent Claim
119 words
IN A THERMIONIC EVAPORATION RATE CONTROLLER FOR EVAPORATING METAL TO FORM FILM TYPE RESISTORS OR THE LIKE, THE COMBINATION WHICH COMPRISES, AN EVAPORATION CHAMBER AND MEANS FOR EVACUATING SAID CHAMBER, A FILAMENT WITHIN SAID EVAPORATION CHAMBER FOR CONTROLLING THE RATE OF EVAPORATION, A VARIABLE POWER SUPPLY ASSOCIATED WITH THE FILAMENT FOR SUPPLYING CURRENT THERETO, AN ANODE ASSOCIATED WITH THE FILAMENT, A DIRECT VOLTAGE SOURCE CONNECTED BETWEEN THE ANODE AND THE FILAMENT SO THAT THERMIONIC CURRENT FLOWS FROM THE FILAMENT TO THE ANODE, AND MEANS RESPONSIVE TO THE MAGNITUDE OF THERMIONIC CURRENT FLOW FOR CONTROLLING THE VARIABLE POWER SUPPLY TO VARY THE CURRENT SUPPLIED TO THE FILAMENT SO THAT THE FILAMENT TEMPERATURE IS MAINTAINED AT SUBSTANTIALLY A CONSTANT DESIRED LEVEL.
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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |