Patent US2811445A successfully refreshed from Google Patents.
US2811445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods for making photo contour map
Assignee: Individual
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Filing: 1956-09-11
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Granted: 1957-10-29
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Expires: 1976-09-11
Abstract
No abstract record available.
Inventors
- 👤 Richard O Mahan
- 👤 Roswell M Towill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:42
CPC Classifications
G; G01; G01C; G01C11/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
216 words
A METHOD OF PHOTOGRAPHICALLY PRODUCING A CONTOUR MAP FROM A SERIES OF STEREOSOPIC AERIAL PHOTOGRAPHS, SAID METHOD INCLUDING THE STEPS OF FORMING DIAPOSITIVES OF SAID AERIAL PHOTOGRAPHS, PLOTTING CONTOUR LINES ON A COMPILATION SHEET UTILIZING STEREO MODELS PROJECTED FROM SAID DIAPOSITIVES, FORMING A TRANSPARENT FILM POSITIVE OF SAID COMPILATION SHEET, COVERING SAID TRANSPARENT POSITIVE WITH AN OPAQUE MASK, REMOVING FROM SAID POSITIVE THAT PORTION OF SAID MASK WHICH LIES BETWEEN SELECTED CONTOUR LINES, PLACING SAID PARTLY UNMASKED POSITIVE AGAINSTT A PHOTOSENSITIVE MEDIUM, PROJECTING A RESTITUTED AND ENLARGED IMAGE FROM ONE OF SAID DIAPOSITIVES AGAINST THAT PORTION OF SAID PHOTOSENSITIVE FILM EXPOSED BY THE UNMASKED PORTION OF SAID POSITIVE, THE AMOUNT OF ENLARGEMENT BEING SELECTED TO PROVIDE A PROJECTED IMAGE OF CORRECT SIZE FOR THE MEAN ELEVATION OF THE UNMASKED AREA, REMASKING THE UNMASKED PORTION OF SAID POSITIVE, REMOVING A SECOND PORTION OF SAID MASK WHICH LIES BE-TWEEN OTHER SELECTED CONTOUR LINES, PROJECTING A RESTITUTED IMAGE ENLARGED TO PROVIDE A PROJECTED IMAGE OF CORRECT SIZE FOR THE MEAN ELEVATION OF SAID SECOND UNMASKED AREA, REPEATING SAID UNMASKING, PROJECTING AND REMASKING STEPS UNTIL ALL THE DESIRED IMAGE AREAS OF SAID DIAPOSITIVES ARE PHOTOGRAPHICALLY RECORDED ON SAID PHOTOSENSITIVE MEDIUM ALONG WITH THE CONTOUR LINES RECORDED ON SAID TRANSPARENT FILM POSITIVE, DEVELOPING SAID EXPOSED FILM, AND PRODUCING A MAP THEREFROM.
Claim 2
Independent Claim
216 words
A METHOD OF PHOTOGRAPHICALLY PRODUCING A CONTOUR MAP FROM A SERIES OF STEREOSOPIC AERIAL PHOTOGRAPHS, SAID METHOD INCLUDING THE STEPS OF FORMING DIAPOSITIVES OF SAID AERIAL PHOTOGRAPHS, PLOTTING CONTOUR LINES ON A COMPILATION SHEET UTILIZING STEREO MODELS PROJECTED FROM SAID DIAPOSITIVES, FORMING A TRANSPARENT FILM POSITIVE OF SAID COMPILATION SHEET, COVERING SAID TRANSPARENT POSITIVE WITH AN OPAQUE MASK, REMOVING FROM SAID POSITIVE THAT PORTION OF SAID MASK WHICH LIES BETWEEN SELECTED CONTOUR LINES, PLACING SAID PARTLY UNMASKED POSITIVE AGAINSTT A PHOTOSENSITIVE MEDIUM, PROJECTING A RESTITUTED AND ENLARGED IMAGE FROM ONE OF SAID DIAPOSITIVES AGAINST THAT PORTION OF SAID PHOTOSENSITIVE FILM EXPOSED BY THE UNMASKED PORTION OF SAID POSITIVE, THE AMOUNT OF ENLARGEMENT BEING SELECTED TO PROVIDE A PROJECTED IMAGE OF CORRECT SIZE FOR THE MEAN ELEVATION OF THE UNMASKED AREA, REMASKING THE UNMASKED PORTION OF SAID POSITIVE, REMOVING A SECOND PORTION OF SAID MASK WHICH LIES BE-TWEEN OTHER SELECTED CONTOUR LINES, PROJECTING A RESTITUTED IMAGE ENLARGED TO PROVIDE A PROJECTED IMAGE OF CORRECT SIZE FOR THE MEAN ELEVATION OF SAID SECOND UNMASKED AREA, REPEATING SAID UNMASKING, PROJECTING AND REMASKING STEPS UNTIL ALL THE DESIRED IMAGE AREAS OF SAID DIAPOSITIVES ARE PHOTOGRAPHICALLY RECORDED ON SAID PHOTOSENSITIVE MEDIUM ALONG WITH THE CONTOUR LINES RECORDED ON SAID TRANSPARENT FILM POSITIVE, DEVELOPING SAID EXPOSED FILM, AND PRODUCING A MAP THEREFROM.
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) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |