US3552819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illuminated reticle for optical viewing instruments
Assignee: Ernst Leitz Wetzlar GmbH
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Filing: 1967-11-06
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Granted: 1971-01-05
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Expires: 1987-11-06
Abstract
Abstract IN AN OPTICAL VIEWING INSTRUMENT COMPRISING AT LEAST ONE MIRROR SURFACE ON WHICH AN INTERMEDIATE IMAGE IS FORMED AND MORE PARTICULARLY IN A CATOPTRIC GUN SIGHT A RETICLE IS PRODUCED ON SAID MIRROR SURFACE BY REMOVING THE REFLECTIVE COATING IN APPROPRIATE SHAPE. BEHIND THE MIRROR A LIGHT SOURCE IS ARRANGED FOR ILLUMINATION OF SAID RETICLE AND MEANS ARE PROVIDED ADAPTED TO ADJUST THE INTENSITY OF SAID ILLUMINATION TO THE BRIGHTNESS OF THE OBJECT TO BE OBSERVED.
Inventors
- 👤 Walter Mandler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:11
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/32; G02B27/34
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |