Patent US3422308A successfully refreshed from Google Patents.
US3422308A
Expired / Lapsed
US
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Light intensifier circuit for flash photography
Assignee: Bausch and Lomb Inc
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Filing: 1966-07-14
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Granted: 1969-01-14
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Expires: 1986-07-14
Abstract
No abstract record available.
Inventors
- 👤 Bernard J Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:00
CPC Classifications
H; H05; H05B; H05B39/00; H05B39/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3123738A
Cited
US1939332A
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US2917668A
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US2983849A
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US3210645A
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US3134048A
Cited
US3156826A
Cited
US3325682A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |