US1394145A
Expired / Lapsed
US
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Thermionic discharge apparatus
Assignee: General Electric Co
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Filing: 1919-11-15
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Granted: 1921-10-18
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Expires: 1939-11-15
Abstract
Abstract 197,774. British Thomson - Houston Co., Ltd., (General Electric Co.). March 6, 1922. Drawings to Specification. Transformers.-In apparatus comprising a high tension current source, e.g. a transformer, and an electron discharge device, e.g. an X-ray tube, both immersed in oil in a container, a part or all of the container is made of a material, e.g. copper or aluminium, having a high co-efficient of heat conductivity, so that the heat generated by the apparatus can be quickly conducted away to the atmosphere. Specifications 14892/13, [Class 39 (i), Electric lamps, Arc &c.], and 145,839 are referred to.
Inventors
- 👤 William D Coolidge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:12
CPC Classifications
H; H05; H05G; H05G1/00; H05G1/02; H05G1/04; H05G1/06; H05G1/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1924-10-17 | 1925-04-18 | 1925-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-10-17 | 1929-04-18 | 1929-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-10-17 | 1933-04-18 | 1933-10-18 | $7700.00 | Window Closed / Lapsed |