US3671127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light beam range-finder
Assignee: Paillard SA
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Filing: 1970-09-14
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Granted: 1972-06-20
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Expires: 1990-09-14
Abstract
Abstract A RANGE-FINDER COMPRISING A PROJECTOR DIRECTING A LIGHT BEAM ON THE SUBJECT, THE DISTANCE OF WHICH HAS TO E MEASURED, AND AN OPTICAL CONVERGING SYSTEM COLLECTING RAYS DIFFUSED BY THE LUMINOUS SPOT OBTAINED ON THE SUBJECT AND A PHOTO-SENSITIVE DEVICE FOR MEASURING THE FOCUSING DISTANCE OF THE COLLECTED RAYS. THE PHOTO-SENSITIVE DEVICE COMPRISES A MOVABLE SCREEN HAVING AN EDGE ADAPTED TO SEPARATE THE RAYS NEAR THE CONVERGING POINT TO DIFFERENTIALLY DIRECT THEM ONTO TWO PHOTO-ELEMENTS. MEANS ARE PROVIDED TO PREVENT PARASITIC LIGHT RAYS TO IMPINGE ON THE PHOTOELEMENTS.
Inventors
- 👤 Giovanni Odone
- 👤 Christian Lietar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:01
CPC Classifications
G; G01; G01C; G01C3/00; G01C3/32
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |