Patent US3152276A successfully refreshed from Google Patents.
US3152276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron tube having coaxial terminals for an interiorly emissive cathode
Assignee: US Philips Corp
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Filing: 1960-09-08
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Granted: 1964-10-06
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Expires: 1980-09-08
Abstract
No abstract record available.
Inventors
- 👤 Eduard G Dorgelo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:59
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/42; H01J2893/00; H01J2893/0001; H01J2893/0002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
AN ELECTRON DISCHARGE TUBE COMPRISING AN ANODE, A CATHODE ADAPTED TO EMIT CURRENTS OF THE ORDER OF THOUSANDS OF AMPERES SURROUNDING SAID ANODE, AND TERMINAL MEANS FOR SAID CATHODE COMPRISING A PAIR OF COAXIAL METAL CYLINDERS SURROUNDING SAID CATHODE AND INSULATED FROM EACH OTHER.
Claim 2
Dependent Claim
44 words
AN ELECTRON DISCHARGE TUBE COMPRISING AN ANODE, A CATHODE ADAPTED TO EMIT CURRENTS OF THE ORDER OF THOUSANDS OF AMPERES SURROUNDING SAID ANODE, AND TERMINAL MEANS FOR SAID CATHODE COMPRISING A PAIR OF COAXIAL METAL CYLINDERS SURROUNDING SAID CATHODE AND INSULATED FROM EACH OTHER.
References Cited (Backward Citations)
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Cited
US1874292A
Cited
US1962195A
Cited
US2482495A
Cited
US2662990A
Cited
US2882436A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-06 | 1968-04-06 | 1968-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-06 | 1972-04-06 | 1972-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-06 | 1976-04-06 | 1976-10-06 | $7700.00 | Window Closed / Lapsed |