Patent US3280714A successfully refreshed from Google Patents.
US3280714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mirror reflex camera
Assignee: Zeiss Ikon AG
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Filing: 1964-07-08
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Granted: 1966-10-25
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Expires: 1984-07-08
Abstract
No abstract record available.
Inventors
- 👤 Gunter Willi
- 👤 Zink Werner
- 👤 Nurtingen Kreis
- 👤 Ebertz Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:24
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/02; G03B17/08; G03B7/00; G03B7/08; G03B7/099; G03B7/0993; G03B7/0997; G03B7/09971; G03B7/09972
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
IN A SINGLE LENS MIRROR REFLEX CAMERA HAVING A CAMERA OBJECTIVE ARRANGED ON THE FRONT WALL OF A CAMERA CASING, A VIEWFINDER, A PIVOTALLY MOUNTED PARTLY TRANSPARENT MIRROR FOR REFLECTING A PORTION OF THE LIGHT BEAM PASSING THROUGH SAID CAMERA OBJECTIVE INTO SAID VIEWFINDER, A PHOTOELECTRIC ELEMENT MOUNTED INSIDE SAID CAMERA CASING ON THE BOTTOM WALL THEREOF, AND PIVOTALLY MOUNTED LIGHT BEAM DEFLECTING MEANS FOR DIRECTING A PORTION OF THE LIGHT BEAM ENTERING SAID CAMERA THROUGH SAID CAMERA OBJECTIVE ONTO SAID PHOTOELECTRIC ELEMENT, SAID LIGHT BEAM DEFLECTING MEANS BEING ARRANGED ON THE REAR OF SAID PARTLY TRANSPARENT MIRROR SO AS TO BE PIVOTALLY MOVED WITH THE LATTER, SAID LIGHT BEAM DEFLECTING MEANS COMPRISING A PLURALTIY OF SPACED REFLECTIVE SURFACES ARRANGED TRANSVERSELY IN THE PATH OF SAID LIGHT BEAM, SAID REFLECTIVE SURFACES BEING FORMED ON METALLIC STRIPS WHICH ARE FIXEDLY ATTACHED TO SAID PARTLY TRANSPARENT MIRROR, EACH ONE OF SAID REFLECTIVE SURFACES DEFLECTING A PORTION OF THE LIGHT BEAM EMPLOYED FOR MEASURING THE LIGHT ONTO SAID PHOTOELECTRIC ELEMENT INDEPENDENTLY OF THE ADJACENT REFLECTIVE SURFACES.
Claim 2
Dependent Claim
173 words
IN A SINGLE LENS MIRROR REFLEX CAMERA HAVING A CAMERA OBJECTIVE ARRANGED ON THE FRONT WALL OF A CAMERA CASING, A VIEWFINDER, A PIVOTALLY MOUNTED PARTLY TRANSPARENT MIRROR FOR REFLECTING A PORTION OF THE LIGHT BEAM PASSING THROUGH SAID CAMERA OBJECTIVE INTO SAID VIEWFINDER, A PHOTOELECTRIC ELEMENT MOUNTED INSIDE SAID CAMERA CASING ON THE BOTTOM WALL THEREOF, AND PIVOTALLY MOUNTED LIGHT BEAM DEFLECTING MEANS FOR DIRECTING A PORTION OF THE LIGHT BEAM ENTERING SAID CAMERA THROUGH SAID CAMERA OBJECTIVE ONTO SAID PHOTOELECTRIC ELEMENT, SAID LIGHT BEAM DEFLECTING MEANS BEING ARRANGED ON THE REAR OF SAID PARTLY TRANSPARENT MIRROR SO AS TO BE PIVOTALLY MOVED WITH THE LATTER, SAID LIGHT BEAM DEFLECTING MEANS COMPRISING A PLURALTIY OF SPACED REFLECTIVE SURFACES ARRANGED TRANSVERSELY IN THE PATH OF SAID LIGHT BEAM, SAID REFLECTIVE SURFACES BEING FORMED ON METALLIC STRIPS WHICH ARE FIXEDLY ATTACHED TO SAID PARTLY TRANSPARENT MIRROR, EACH ONE OF SAID REFLECTIVE SURFACES DEFLECTING A PORTION OF THE LIGHT BEAM EMPLOYED FOR MEASURING THE LIGHT ONTO SAID PHOTOELECTRIC ELEMENT INDEPENDENTLY OF THE ADJACENT REFLECTIVE SURFACES.
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) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |