Patent US2995674A successfully refreshed from Google Patents.
US2995674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impregnated cathodes
Assignee: Raytheon Co
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Filing: 1959-02-27
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Granted: 1961-08-08
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Expires: 1979-02-27
Abstract
No abstract record available.
Inventors
- 👤 Joseph H Apelbaum
- 👤 Kenneth W Dudley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:51
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/20; H01J1/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A CATHODE COMPRISING A POROUS BODY OF TUNGSTEN AND A MIXTURE COMPRISING CHROMIC OXIDE AND AN ALKALINE EARTH OXIDE DISPOSED WITHIN SAID BODY.
Claim 2
Dependent Claim
23 words
A CATHODE COMPRISING A POROUS BODY OF TUNGSTEN AND A MIXTURE COMPRISING CHROMIC OXIDE AND AN ALKALINE EARTH OXIDE DISPOSED WITHIN SAID BODY.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-07 | 1965-02-06 | 1965-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-07 | 1969-02-06 | 1969-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-07 | 1973-02-06 | 1973-08-08 | $7700.00 | Window Closed / Lapsed |