US2870520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation-producing device
Assignee: Laboratoires dElectronique Philips SAS
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Filing: 1955-02-28
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Granted: 1959-01-27
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Expires: 1975-02-28
Abstract
No abstract record available.
Inventors
- 👤 Desvignes Francois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:11
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/02; H01K1/04; H01K1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A METHOD OF MAKING A RADIATING ELEMENT FOR A RADIATION-PRODUCING DEVICE, COMPRISING PREPARING A WET MIXTURE CONSISTING ESSENTIALLY OF A REFRACTORY METAL OXIDE, THEREAFTER MOLDING SAID MIXTURE INTO THE DESIRED FORM OF THE RADIATING ELEMENT, HEATING SAID MOLDED MIXTURE AT A TEMPERATURE AT WHICH A HARD BODY IS FORMED AND IN AN ATMOSPHERE CONTAINING OXYGEN AT A PRESSURE BELOW THAT PRESENT IN THE OUTSIDE ATMOSPHERE AND FOR A TIME INTERVAL AT WHICH THE ELECTRICAL CONDUCTIVITY OF THE BODY INCREASES TO A VALUE AT LEAST EQUAL TO 10-5 MHOS/CM. AT 20*C., AND APPLYING TO THE ENDS OF SAID BODY TERMINALS FOR APPLYING A VOLTAGE THERETO.
Claim 2
Independent Claim
104 words
A METHOD OF MAKING A RADIATING ELEMENT FOR A RADIATION-PRODUCING DEVICE, COMPRISING PREPARING A WET MIXTURE CONSISTING ESSENTIALLY OF A REFRACTORY METAL OXIDE, THEREAFTER MOLDING SAID MIXTURE INTO THE DESIRED FORM OF THE RADIATING ELEMENT, HEATING SAID MOLDED MIXTURE AT A TEMPERATURE AT WHICH A HARD BODY IS FORMED AND IN AN ATMOSPHERE CONTAINING OXYGEN AT A PRESSURE BELOW THAT PRESENT IN THE OUTSIDE ATMOSPHERE AND FOR A TIME INTERVAL AT WHICH THE ELECTRICAL CONDUCTIVITY OF THE BODY INCREASES TO A VALUE AT LEAST EQUAL TO 10-5 MHOS/CM. AT 20*C., AND APPLYING TO THE ENDS OF SAID BODY TERMINALS FOR APPLYING A VOLTAGE THERETO.
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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) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |