US3476940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photomultiplier system whereby dynode voltage supply is varied in accordance with modulation of incident light,holding output current constant and using measure of dynode voltage as measure of modulation of light
Assignee: GAF Chemicals Corp
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Filing: 1967-12-12
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Granted: 1969-11-04
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Expires: 1987-12-12
Abstract
No abstract record available.
Inventors
- 👤 Robert W Houser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:30
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/27; G01J; G01J1/00; G01J1/10; G01J1/16; G01J1/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2605430A
Cited
US2840720A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |