Patent US4581334A successfully refreshed from Google Patents.
Patent US2793129A successfully refreshed from Google Patents.
Patent US3073223A successfully refreshed from Google Patents.
US3073223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viewfinder indicators for photographic cameras
Assignee: —
•
Filing: —
•
Granted: 1963-01-15
•
Expires: 1980-01-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:38
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/099; G03B13/00; G03B13/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
IN A CAMERA HAVING A VIEWFINDER, THE COMBINATION COMPRISING: A PHOTOCELL; LOUVERS FOR LIMITING THE VERTICAL ACCEPTANCE ANGLE OF SAID PHOTOCELL; MANUALLY ADJUSTABLE SELECTING MEANS FOR MOVING SAID LOUVERS ANGULARLY ABOUT AT LEAST ONE AXIS WHICH IS HORIZONTAL WHEN SAID CAMERA IS HELD IN A PREDETERMINED, NORMAL POSITION FOR PHOTOGRAPHY, THEREBY TO ADJUST THE VERTICAL RELATION OF SAID
Claim 2
Dependent Claim
58 words
IN A CAMERA HAVING A VIEWFINDER, THE COMBINATION COMPRISING: A PHOTOCELL; LOUVERS FOR LIMITING THE VERTICAL ACCEPTANCE ANGLE OF SAID PHOTOCELL; MANUALLY ADJUSTABLE SELECTING MEANS FOR MOVING SAID LOUVERS ANGULARLY ABOUT AT LEAST ONE AXIS WHICH IS HORIZONTAL WHEN SAID CAMERA IS HELD IN A PREDETERMINED, NORMAL POSITION FOR PHOTOGRAPHY, THEREBY TO ADJUST THE VERTICAL RELATION OF SAID
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) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |