Patent US3307462A successfully refreshed from Google Patents.
US3307462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic flash control device for photographic cameras
Assignee: Eastman Kodak Co
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Filing: 1965-01-22
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Granted: 1967-03-07
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Expires: 1985-01-22
Abstract
No abstract record available.
Inventors
- 👤 Jr Miller R Hutchison
- 👤 Samuel S Merz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:47
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/16; H; H05; H05B; H05B41/00; H05B41/14; H05B41/30; H05B41/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
IN A CAMERA ADAPTED TO RECEIVE A FLASH LAMP, THE COMBINATION COMPRISING: A SERIES CIRCUIT INCLUDING SAID LAMP, A SOURCE OF ELECTRICAL POTENTIAL, AND GATED SWITCHING MEANS HAVING A GATING INPUT AND A NORMALLY OPEN CONDITION AND A CLOSED CONDITION ASSUMED IN RESPONSE TO AT LEAST A PREDETERMINED POTENTIAL APPLIED TO SAID GATING INPUT; A PHOTOCELL ILLUMINATABLE BY FIELD LIGHT AND ARRANGED IN CIRCUIT WITH SAID SOURCE FOR REGULATING THE POTENTIAL OF SAID GATING INPUT FOR ENABLING SAID SWITCHING MEANS TO ASSUME ITS CLOSED CONDITION ONLY WHEN SAID PHOTOCELL RECEIVES ILLUMINATION BELOW A PREDETERMINED LEVEL, WHEREBY IN
Claim 2
Dependent Claim
97 words
IN A CAMERA ADAPTED TO RECEIVE A FLASH LAMP, THE COMBINATION COMPRISING: A SERIES CIRCUIT INCLUDING SAID LAMP, A SOURCE OF ELECTRICAL POTENTIAL, AND GATED SWITCHING MEANS HAVING A GATING INPUT AND A NORMALLY OPEN CONDITION AND A CLOSED CONDITION ASSUMED IN RESPONSE TO AT LEAST A PREDETERMINED POTENTIAL APPLIED TO SAID GATING INPUT; A PHOTOCELL ILLUMINATABLE BY FIELD LIGHT AND ARRANGED IN CIRCUIT WITH SAID SOURCE FOR REGULATING THE POTENTIAL OF SAID GATING INPUT FOR ENABLING SAID SWITCHING MEANS TO ASSUME ITS CLOSED CONDITION ONLY WHEN SAID PHOTOCELL RECEIVES ILLUMINATION BELOW A PREDETERMINED LEVEL, WHEREBY IN
References Cited (Backward Citations)
US2750453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |