Patent US2804196A successfully refreshed from Google Patents.
Patent US2802127A successfully refreshed from Google Patents.
US2802127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynode coating
Assignee: Individual
•
Filing: 1954-02-03
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Granted: 1957-08-06
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Expires: 1974-02-03
Abstract
No abstract record available.
Inventors
- 👤 Dobischek Dietrich
- 👤 John B Freely
- 👤 Jacobs Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:03
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/12; H01J9/125; H01J2201/00; H01J2201/32
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
42 words
A DISCHARGE COMPRISING AN EVACUTED ENVELOPE INCLUDING THEREWITHIN AT LEAST AN EMITTING CATHODE AND AN ANODE HAVING A POROUS MAGNESIUM OXIDE COATING THEREON, SAID COATING OF MAGNESIUM OXIDE CRYSTALS OF STALACTITE LIKE STRUCTURE AND HAVING A HIGH SECONDARY TO PRIMARY EMISSION RATIO.
References Cited (Backward Citations)
US1802474A
Cited
US2151783A
Cited
US2146607A
Cited
US2198329A
Cited
US2171227A
Cited
US2401040A
Cited
US2526574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-05 | 1961-02-04 | 1961-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-05 | 1965-02-04 | 1965-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-05 | 1969-02-04 | 1969-08-06 | $7700.00 | Window Closed / Lapsed |