US3139016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Range finder device for photographic cameras
Assignee: Carl Zeiss AG
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Filing: 1961-06-21
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Granted: 1964-06-30
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Expires: 1981-06-21
Abstract
No abstract record available.
Inventors
- 👤 Lange Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:44
CPC Classifications
G; G03; G03B; G03B13/00; G03B13/18; G03B13/24; G03B13/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
RANGE FINDER DEVICE CONNECTED WITH THE OBJECTIVE OF A PHOTOGRAPHIC CAMERA HAVING A RECTANGULAR VIEW FINDER IMAGE AREA, MEANS FOR DEFLECTING A PORTION OF THE LIGHT ENTERING SAID OBJECTIVE INTO SAID RANGE FINDER WHICH CONTAINS A REAL IMAGE PLANE, A DOUBLE OPTICAL WEDGE FORMING A SHARPNESS INDICATOR ARRANGED IN SAID IMAGE PLANE, SAID DOUBLE OPTICAL WEDGE HAVING TWO OPPOSITELY INCLINED TRUNCATED WEDGE FACES IN SIDE BY SIDE RELATION OF WHICH EACH FACE COVERS ONE HALF OF SAID VIEW FINDER IMAGE AREA, THE TRUNCATED PORTIONS OF SAID WEDGES FACES BEING OFFSET FROM THE TRANSVERSE CENTER LINE OF SAID DOUBLE OPTICAL
Claim 2
Dependent Claim
99 words
RANGE FINDER DEVICE CONNECTED WITH THE OBJECTIVE OF A PHOTOGRAPHIC CAMERA HAVING A RECTANGULAR VIEW FINDER IMAGE AREA, MEANS FOR DEFLECTING A PORTION OF THE LIGHT ENTERING SAID OBJECTIVE INTO SAID RANGE FINDER WHICH CONTAINS A REAL IMAGE PLANE, A DOUBLE OPTICAL WEDGE FORMING A SHARPNESS INDICATOR ARRANGED IN SAID IMAGE PLANE, SAID DOUBLE OPTICAL WEDGE HAVING TWO OPPOSITELY INCLINED TRUNCATED WEDGE FACES IN SIDE BY SIDE RELATION OF WHICH EACH FACE COVERS ONE HALF OF SAID VIEW FINDER IMAGE AREA, THE TRUNCATED PORTIONS OF SAID WEDGES FACES BEING OFFSET FROM THE TRANSVERSE CENTER LINE OF SAID DOUBLE OPTICAL
References Cited (Backward Citations)
US2526204A
Cited
US2669916A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |