Patent US3286609A successfully refreshed from Google Patents.
US3286609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light receiving device for electrical exposure meter for cameras
Assignee: Minolta Co Ltd
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Filing: 1964-03-03
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Granted: 1966-11-22
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Expires: 1984-03-03
Abstract
No abstract record available.
Inventors
- 👤 Kobayashi Tatsuo
- 👤 Konishi Masaichiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:00
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/099; G03B7/0993
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A LIGHT RECEIVING DEVICE FOR AN ELECTRICAL EXPOSURE METER FOR A CAMERA, SAID DEVICE COMPRISING AN ANNULAR LENS TUBE BODY, A MAIN OBJECTIVE LENS DISPOSED WITHIN SAID TUBE, AN ANNULAR RECESS FORMED BETWEEN SAID OBJECTIVE LENS AND SAID TUBE BODY, A CONDENSING LENS POSITIONED AT THE FRONT END OF SAID TUBE BODY WITH ITS OPTICAL AXIS PARALLEL TO THE OPTICAL AXIS OF SAID OBJECTIVE LENS, A LIGHT RECEIVING BODY POSITIONED BEHIND SAID CONDERSING LENS AND WITHIN SAID ANNULAR RECESS, AN ADJUSTABLE ANNULAR DISPHRAGM MOUNTED WITHIN SAID TUBE BODY BETWEEN SAID CONDENSING LENS AND SAID LIGHT RECEIVING BODY, SAID DIAPHRAGM HAVING A GROUP OF SLIT-LIKE IRIS OPENINGS THEREIN, THE INVENTION BE-
Claim 2
Dependent Claim
110 words
A LIGHT RECEIVING DEVICE FOR AN ELECTRICAL EXPOSURE METER FOR A CAMERA, SAID DEVICE COMPRISING AN ANNULAR LENS TUBE BODY, A MAIN OBJECTIVE LENS DISPOSED WITHIN SAID TUBE, AN ANNULAR RECESS FORMED BETWEEN SAID OBJECTIVE LENS AND SAID TUBE BODY, A CONDENSING LENS POSITIONED AT THE FRONT END OF SAID TUBE BODY WITH ITS OPTICAL AXIS PARALLEL TO THE OPTICAL AXIS OF SAID OBJECTIVE LENS, A LIGHT RECEIVING BODY POSITIONED BEHIND SAID CONDERSING LENS AND WITHIN SAID ANNULAR RECESS, AN ADJUSTABLE ANNULAR DISPHRAGM MOUNTED WITHIN SAID TUBE BODY BETWEEN SAID CONDENSING LENS AND SAID LIGHT RECEIVING BODY, SAID DIAPHRAGM HAVING A GROUP OF SLIT-LIKE IRIS OPENINGS THEREIN, THE INVENTION BE-
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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |