US2961352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistance films and method of making
Assignee: General Electric Co
•
Filing: 1957-01-02
•
Granted: 1960-11-22
•
Expires: 1977-01-02
Abstract
No abstract record available.
Inventors
- 👤 Grattidge Walter
- 👤 James E Beggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:08
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49099
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
THE METHOD OF MAKING A VACUUM RESISTOR INCLUDING A RESISTIVE COATING ON A SURFACE OF A CERAMIC MEMBER EXPOSED TO THE INTERIOR OF AN ENCLOSURE, THE CERAMIC MEMBER HAVING AS A MAJOR CONSITITUENT AN OXIDE WHICH DOES NOT DECOMPOSE AT A TEMPERATURE WITHIN A PREDETERMINED RANGE OF ELEVATED TEMPERATURES IN THE PRESENCE OF HYDROGEN AND SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM OXIDE AND ALUMINA, WHICH METHOD COMPRISES APPLYING TO SAID SURFACE OF SAID CERAMIC MEMBER A METALLIC OXIDE WHICH IS DECOMPOSED AT A TEMPERATURE WITHIN SAID PREDETERMINED RABGE IN THE PRESENCE OF HYDROGEN, EVACUATING THE ENCLOSURE, HEATING THE COATED SURFACE OF THE CERAMIC MEMBER TO A TEMPERATURE BELOW THE MELTING POINT OF SAID OXYGEN-CONTAINING COMPOUND AND SUBJECTING THE COATED SURFACE THEREOF TO AN ATMOSPHERE OF HYDROGEN WHILE AT A TEMPERATURE WITHIN SAID RANGE TO DECOMPOSE SAID OXYGEN BEARING COMPOUND AND PROVIDE A RESISTANCE FILM ON SAID CERAMIC, CONTINUING THE EVACUATION OF THE ENCLOSURE AND SEALING THE ENCLOSURE TRO PROVIDE A VACUUM RESISTOR.
Claim 2
Independent Claim
163 words
THE METHOD OF MAKING A VACUUM RESISTOR INCLUDING A RESISTIVE COATING ON A SURFACE OF A CERAMIC MEMBER EXPOSED TO THE INTERIOR OF AN ENCLOSURE, THE CERAMIC MEMBER HAVING AS A MAJOR CONSITITUENT AN OXIDE WHICH DOES NOT DECOMPOSE AT A TEMPERATURE WITHIN A PREDETERMINED RANGE OF ELEVATED TEMPERATURES IN THE PRESENCE OF HYDROGEN AND SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM OXIDE AND ALUMINA, WHICH METHOD COMPRISES APPLYING TO SAID SURFACE OF SAID CERAMIC MEMBER A METALLIC OXIDE WHICH IS DECOMPOSED AT A TEMPERATURE WITHIN SAID PREDETERMINED RABGE IN THE PRESENCE OF HYDROGEN, EVACUATING THE ENCLOSURE, HEATING THE COATED SURFACE OF THE CERAMIC MEMBER TO A TEMPERATURE BELOW THE MELTING POINT OF SAID OXYGEN-CONTAINING COMPOUND AND SUBJECTING THE COATED SURFACE THEREOF TO AN ATMOSPHERE OF HYDROGEN WHILE AT A TEMPERATURE WITHIN SAID RANGE TO DECOMPOSE SAID OXYGEN BEARING COMPOUND AND PROVIDE A RESISTANCE FILM ON SAID CERAMIC, CONTINUING THE EVACUATION OF THE ENCLOSURE AND SEALING THE ENCLOSURE TRO PROVIDE A VACUUM RESISTOR.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |