US2877078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating phototubes
Assignee: Allen B du Mont Laboratories Inc
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Filing: 1954-04-13
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Granted: 1959-03-10
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Expires: 1974-04-13
Abstract
No abstract record available.
Inventors
- 👤 Gauthier Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:01
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
IN THE MANUFACTURE OF A PHOTOTUBE COMPRISING A BULB HAVING A GLASS WALL, A SILVER MAGNESIUM DYNODE STRUCTURE, AND A SOURCE OF CESIUM, THE METHOD CONSISTING IN THE STEPS OF HEATING SAID SOURCE TO CREATE CESIUM VAPOR WITHIN SAID BULB; HEATING SAID DYNODE STRUCTURE TO A TEMPERATURE GREATER THAN THAT OF THE WALL OF SAID BULB WHEREBY CESIUM ON SAID DYNODE STRUCTURE IS EVAPORATED AND CONDENSED ON SAID WALL.
Claim 2
Dependent Claim
69 words
IN THE MANUFACTURE OF A PHOTOTUBE COMPRISING A BULB HAVING A GLASS WALL, A SILVER MAGNESIUM DYNODE STRUCTURE, AND A SOURCE OF CESIUM, THE METHOD CONSISTING IN THE STEPS OF HEATING SAID SOURCE TO CREATE CESIUM VAPOR WITHIN SAID BULB; HEATING SAID DYNODE STRUCTURE TO A TEMPERATURE GREATER THAN THAT OF THE WALL OF SAID BULB WHEREBY CESIUM ON SAID DYNODE STRUCTURE IS EVAPORATED AND CONDENSED ON SAID WALL.
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) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |