US3249000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic reproduction control apparatus
Assignee: Individual
•
Filing: 1963-02-27
•
Granted: 1966-05-03
•
Expires: 1983-02-27
Abstract
No abstract record available.
Inventors
- 👤 Jean C Pack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:29
CPC Classifications
G; G03; G03F; G03F5/00; G03F5/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
APPARATUS FOR PRODUCING HALFTONE POSITIVES OR NEGATIVES INCLUDING A CAMERA HAVING FRONT AND REAR WALLS, A CONTACT SCREEN MOUNTED IN THE REAR WALL, A LENS MOUNTED IN THE FRONT WALL, AND ADJUSTABLE SHUTTER MOUNTED IN THE FRONT WALL SPACED REARWARDLY OF SAID LENS, A MOVABLE PHOTO-ELECTRIC TUBE INTERPOSED BETWEEN SAID LENS AND SAID SHUTTER, A FLASHLIGHT MOUNTED IN THE INSIDE OF THE FRONT WALL OF THE CAMERA TO DIRECT LIGHT TOWARD THE REAR WALL OF SAID CAMERA AND SAID CONTACT SCREEN, SAID PHOTO-ELECTRIC TUBE MEASURING THE QUANTITY OF REFLECTED LIGHT, AND TIMING THE OPERATION OF THE SHUTTER, AND TIMING THE PERIOD OF LIGHT FROM SAID FLASHLIGHT TO PRODUCE THE DESIRED HALFTONE REPRODUCTION.
Claim 2
Dependent Claim
112 words
APPARATUS FOR PRODUCING HALFTONE POSITIVES OR NEGATIVES INCLUDING A CAMERA HAVING FRONT AND REAR WALLS, A CONTACT SCREEN MOUNTED IN THE REAR WALL, A LENS MOUNTED IN THE FRONT WALL, AND ADJUSTABLE SHUTTER MOUNTED IN THE FRONT WALL SPACED REARWARDLY OF SAID LENS, A MOVABLE PHOTO-ELECTRIC TUBE INTERPOSED BETWEEN SAID LENS AND SAID SHUTTER, A FLASHLIGHT MOUNTED IN THE INSIDE OF THE FRONT WALL OF THE CAMERA TO DIRECT LIGHT TOWARD THE REAR WALL OF SAID CAMERA AND SAID CONTACT SCREEN, SAID PHOTO-ELECTRIC TUBE MEASURING THE QUANTITY OF REFLECTED LIGHT, AND TIMING THE OPERATION OF THE SHUTTER, AND TIMING THE PERIOD OF LIGHT FROM SAID FLASHLIGHT TO PRODUCE THE DESIRED HALFTONE REPRODUCTION.
References Cited (Backward Citations)
US2621569A
Cited
US2593216A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |