US2731580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Target electrodes for use in television pick-up tube or the like
Assignee: Cinema Television Ltd
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Filing: 1949-10-22
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Granted: 1956-01-17
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Expires: 1969-10-22
Abstract
No abstract record available.
Inventors
- 👤 Freeman George Stanle Percival
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:34
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/39; H01J29/41; H01J29/413
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A TARGET ELECTRODE FOR A PICTURE-CONVERTING DEVICE COMPRISING: A THIN ELECTRON-PERMEABLE ALUMINUM FILM; A THIN SEMI-CONDUCTING GLASS PLATE SUPPORTED PARALLEL AND IN CLOSE PROXIMITY TO SAID FILM; AND A THIN LAYER OF INSULATING SECONDARY-ELECTRON-EMITTING MATERIAL SPACED FROM SAID PLATE AND AFFIXED TO THE SURFACE OF SAID FILM FACING SAID PLATE.
Claim 2
Dependent Claim
50 words
A TARGET ELECTRODE FOR A PICTURE-CONVERTING DEVICE COMPRISING: A THIN ELECTRON-PERMEABLE ALUMINUM FILM; A THIN SEMI-CONDUCTING GLASS PLATE SUPPORTED PARALLEL AND IN CLOSE PROXIMITY TO SAID FILM; AND A THIN LAYER OF INSULATING SECONDARY-ELECTRON-EMITTING MATERIAL SPACED FROM SAID PLATE AND AFFIXED TO THE SURFACE OF SAID FILM FACING SAID PLATE.
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) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |