US3478213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photomultiplier or image amplifier with secondary emission transmission type dynodes made of semiconductive material with low work function material disposed thereon
Assignee: RCA Corp
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Filing: 1967-09-05
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Granted: 1969-11-11
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Expires: 1987-09-05
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Simon
- 👤 Brown F Williams
- 👤 Ralph Wasserman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:40
CPC Classifications
H; H01; H01J; H01J1/00; H01J1/02; H01J1/34; H01J1/30; H01J1/308; H01J1/32; H01J2201/00; H01J2201/34; H01J2201/342; H01J2201/3421; H01J2201/3423; Y; Y10; Y10S; Y10S148/00; Y10S148/051; Y10S148/12
Claims Analysis
Total Claims: 0
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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) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |