Patent US3113236A successfully refreshed from Google Patents.
US3113236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxide dispenser type cathode
Assignee: US Philips Corp
•
Filing: 1960-06-17
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Granted: 1963-12-03
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Expires: 1980-06-17
Abstract
No abstract record available.
Inventors
- 👤 Lemmens Hendrikus Johannes
- 👤 Zalm Pieter
- 👤 Antonius Johannes Albe Stratum
- 👤 Blatter Johannes Reinier
- 👤 Almer Friedrich Herman Raymund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:55
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/20; H01J1/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A THERMIONIC CATHODE FOR AN ELECTRON DEVICE OPERABLE AT TEMPERATURES OF ABOUT 700*C. TO 850*C., COMPRISING A SUPPORT, A FIRST LAYER ON SAID SUPPORT OF A BARIUM OXIDIC COMPOUND ASSOCIATED WITH A REDUCING SUBSTANCE AND CAPABLE WHEN HEATED OF REACTING TOGETHER TO DISPENSE CONTINUOUSLY FREE BARIUM METAL, BARIUM-PERMEABLE ELECTRICALLY-CONDUCTIVE GRID-LIKE METAL MEMBER OVER AND ENCLOSING THE SAID FIRST LAYER, MEANS PROVIDING AN EXTERNAL CIRCUIT CONNECTION TO SAID GRID-LIKE METAL MEMBER, AND
Claim 2
Dependent Claim
71 words
A THERMIONIC CATHODE FOR AN ELECTRON DEVICE OPERABLE AT TEMPERATURES OF ABOUT 700*C. TO 850*C., COMPRISING A SUPPORT, A FIRST LAYER ON SAID SUPPORT OF A BARIUM OXIDIC COMPOUND ASSOCIATED WITH A REDUCING SUBSTANCE AND CAPABLE WHEN HEATED OF REACTING TOGETHER TO DISPENSE CONTINUOUSLY FREE BARIUM METAL, BARIUM-PERMEABLE ELECTRICALLY-CONDUCTIVE GRID-LIKE METAL MEMBER OVER AND ENCLOSING THE SAID FIRST LAYER, MEANS PROVIDING AN EXTERNAL CIRCUIT CONNECTION TO SAID GRID-LIKE METAL MEMBER, AND
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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) | 1966-12-02 | 1967-06-03 | 1967-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-02 | 1971-06-03 | 1971-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-02 | 1975-06-03 | 1975-12-03 | $7700.00 | Window Closed / Lapsed |