Patent US2323914A successfully refreshed from Google Patents.
US3674366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copy camera
Assignee: Individual
•
Filing: 1970-09-04
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Granted: 1972-07-04
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Expires: 1990-09-04
Abstract
Abstract A PORTABLE COPY CAMERA FOR PRODUCING SCALED REPRODUCTIONS IN ANY ONE OF A PLURALITY OF PREDETERMINED PROPORTIONS. THE OBJECT TO BE REPRODUCED AND THE FILM ARE POSITIONED IN A FIXED CONSTANT RELATIONSHIP WITH RESPECT TO EACH OTHER TO DEFINE AN OPTICAL AXIS. A MECHANISM IS PROVIDED FOR SELECTIVELY ADVANCING INTO ALIGNMENT ON THE OPTICAL AXIS ANY ONE OF A PLURALITY OF LENSES, EACH LENS HAVING A SINGLE PREDETERMINED LOCATION ON THE AXIS CORRESPONDING TO ITS SCALE OF REPRODUCTION. THE LENSES ARE DESIGNED TO PROVIDE A UNIFORM EFFECTIVE APERTURE FOR CONSTANT LIGHT TRANSMISSION WHEN POSITIONED AT THEIR RESPECTIVE OPERATIVE LOCATIONS.
Inventors
- 👤 Jack D Callahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:00
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/34; G03B27/36; G03B27/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |