US3343043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic exposure time control arrangement
Assignee: Pentax Corp
•
Filing: 1964-10-30
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Granted: 1967-09-19
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Expires: 1984-10-30
Abstract
No abstract record available.
Inventors
- 👤 Ito Kioshi
- 👤 Uno Naoyuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:33
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/081; G03B7/083
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
AN AUTOMATIC EXPOSURE CONTROL MECHANISM COMPRISING A VOLTAGE SOURCE, A PHOTOCONDUCTOR, A FIRST CAPACITOR, MEANS CONNECTING SAID FIRST CAPACITOR THROUGH SAID PHOTO CONDUCTOR ACROSS SAID VOLTAGE SOURCE, A CONTROL MEMBER RESPONSIVE TO THE CHARGE ON SAID FIRST CAPACITOR, AND A COMPENSATING NETWORK INCLUDING A RESISTOR AND A SECOND CAPACITOR AND MEANS CONNECTING SAID RESISTOR AND SAID SECOND CAPACITOR IN SERIES WITH SAID PHOTOCONDUCTOR TO SAID VOLTAGE SOURCE.
Claim 2
Dependent Claim
67 words
AN AUTOMATIC EXPOSURE CONTROL MECHANISM COMPRISING A VOLTAGE SOURCE, A PHOTOCONDUCTOR, A FIRST CAPACITOR, MEANS CONNECTING SAID FIRST CAPACITOR THROUGH SAID PHOTO CONDUCTOR ACROSS SAID VOLTAGE SOURCE, A CONTROL MEMBER RESPONSIVE TO THE CHARGE ON SAID FIRST CAPACITOR, AND A COMPENSATING NETWORK INCLUDING A RESISTOR AND A SECOND CAPACITOR AND MEANS CONNECTING SAID RESISTOR AND SAID SECOND CAPACITOR IN SERIES WITH SAID PHOTOCONDUCTOR TO SAID VOLTAGE SOURCE.
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) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |