Patent US3327152A successfully refreshed from Google Patents.
US3327152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-photoemissive grid for a phototube and process for making same
Assignee: Individual
•
Filing: 1964-12-23
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Granted: 1967-06-20
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Expires: 1984-12-23
Abstract
No abstract record available.
Inventors
- 👤 Alfred L Greilich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:13
CPC Classifications
H; H01; H01J; H01J40/00; H01J40/02; H01J40/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
88 words
IN A PHOTOTUBE INCLUDING AT LEAST ONE PHOTOEMISSIVE CATHODE ELECTRODE AND AT LEAST ONE NON-ELECTRON-EMISSIVE ANODE ELECTRODE POSITIONED TO RECEIVE PHOTOELECTRONS EMITTED FROM THE PHOTOEMISSIVE SURFACE OF SAID CATHODE IN RESPONSE THE LIGHT IMPINGING THEREON, THE COMBINATION THEREWITH COMPRISING, (A) A MESH GRID DISPOSED PROXIMATE THE ELECTRON EMITTING SURFACE OF SAID CATHODE ELECTROSTATICALLY BETWEEN SAID CATHODE AND ANODE ELECTRODES, THE SURFACE OF SAID GRID FACING SAID LIGHT THAT IS TO IMPINGE UPON SAID CATHODE WITH A NON-PHOTOEMISSIVE INTERACTION PRODUCT OF A PHOTOEMISSIVE RETARDANT AND A PHOTOEMISSIVE ACTIVATING AGENT.
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) | 1970-06-19 | 1970-12-19 | 1971-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-19 | 1974-12-19 | 1975-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-19 | 1978-12-19 | 1979-06-20 | $7700.00 | Window Closed / Lapsed |