US3167679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode structure
Assignee: AT&T Inc
•
Filing: 1961-03-14
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Granted: 1965-01-26
•
Expires: 1981-03-14
Abstract
No abstract record available.
Inventors
- 👤 Laurence G Lyon
- 👤 John W West
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:15
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/04; H01J23/05; H01J3/00; H01J3/02; H01J3/027
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
55 words
A SUPPORTING STRUCTURE FOR AN ELECTRON EMISSIVE CATHODE COMPRISING A CATHODE, A PLURALITY OF WIRE LOOPS, THE WIRES OF SAID LOOPS PASSING THROUGH SLOTS IN AN ANNULAR MEMBER SURROUNDING SAID CATHODE WHEREBY SAID WIRES ARE HELD UNDER TENSION, THE CATHODE BEING MOUNTED WITHIN SAID LOOPS AND IN CONTACT THEREWITH ADJACENT THE ENDS OF SAID CATHODE.
References Cited (Backward Citations)
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Cited
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Cited
US2874209A
Cited
US2861211A
Cited
DE1098622B
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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) | 1968-01-26 | 1968-07-27 | 1969-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-26 | 1972-07-27 | 1973-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-26 | 1976-07-27 | 1977-01-26 | $7700.00 | Window Closed / Lapsed |