Patent US3290540A successfully refreshed from Google Patents.
US3290540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge tube having a movable cathode tape
Assignee: Westinghouse Electric Corp
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Filing: 1964-04-16
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Granted: 1966-12-06
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Expires: 1984-04-16
Abstract
No abstract record available.
Inventors
- 👤 Atti Eros
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:35
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/48; H01J29/487; H01J29/02; H01J29/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
AN ELECTRON DISCHARGE DEVICE COMPRISING AN ELONGATED FLEXIBLE FILAMENTARY SUPPORT HAVING AT LEAST FIRST AND SECOND EMISSIVE PORTIONS FOR PRODUCING AN ELECTRON BEAM, A TARGET MEANS FOR RECEIVING SAID BEAM, MEANS FOR EXCITING ELECTRONS IN ASSOCIATION WITH SAID FIRST EMISSIVE PORTION, MAGAZINE MEANS FOR STORING AN EXTENDED LENGTH OF SAID FILAMENTARY SUPPORT N A CONTRACTED CONFIGURATION, AND MEANS FOR MOVING SAID SUPPORT SO THAT SAID SECOND EMISSIVE PORTION IS BROUGH INTO ASSOCIATION WITH SAID MEANS FOR EXCITING AND SAID FIRST EMISSIVE PORTION IS DISPLACED FROM SAID MEANS FOR EXCITING.
Claim 2
Dependent Claim
89 words
AN ELECTRON DISCHARGE DEVICE COMPRISING AN ELONGATED FLEXIBLE FILAMENTARY SUPPORT HAVING AT LEAST FIRST AND SECOND EMISSIVE PORTIONS FOR PRODUCING AN ELECTRON BEAM, A TARGET MEANS FOR RECEIVING SAID BEAM, MEANS FOR EXCITING ELECTRONS IN ASSOCIATION WITH SAID FIRST EMISSIVE PORTION, MAGAZINE MEANS FOR STORING AN EXTENDED LENGTH OF SAID FILAMENTARY SUPPORT N A CONTRACTED CONFIGURATION, AND MEANS FOR MOVING SAID SUPPORT SO THAT SAID SECOND EMISSIVE PORTION IS BROUGH INTO ASSOCIATION WITH SAID MEANS FOR EXCITING AND SAID FIRST EMISSIVE PORTION IS DISPLACED FROM SAID MEANS FOR EXCITING.
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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) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |