US3387139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric measuring apparatus using gratings
Assignee: ALLIED RES ASSOCIATES Inc
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Filing: 1965-11-09
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Granted: 1968-06-04
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Expires: 1985-11-09
Abstract
No abstract record available.
Inventors
- 👤 Gerard George
- 👤 Ralph P Papirno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:26
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/26; G01D5/32; G01D5/34; G01D5/36; G01D5/363
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
145 words
IN COMBINATION WITH A GRIDDED TAPE HAVING A PLURALITY OF TRANSPARENT PORTIONS OF LIKE SHAPES AND OF LIKE MAXIMUM WIDTHS EXTENDING TRANSVERSELY THEREOF, SEPARATED BY INTERVENING OPAQUE PORTIONS, SAID TRANSPARENT PORTIONS CONSTITUTING APERTURES OF A FIRST KIND, A LIGHT GATE WHICH COMPRISES AN OPAQUE FRAME BOUNDING AND DEFINING A TRANSPARENT WINDOW OF THE SAME SAID MAXIMUM WIDTH, SAID WINDOW CONSTITUTING AN APERTURE OF A SECOND KIND, ONE OF SAID FIRST AND SECOND APERTURE KINDS BEING CHARACTERIZED BY ASYMMETRY OF ITS CONFIGURATION ABOUT ITS TRANSVERSE AXIS, WHEREBY, WHEN A BEAM OF LIGHT IS PROJECTED, THROUGH THE TAPE AND THE LIGHT GATE IN TANDEM, ONTO A LIGHT SENSITIVE ELEMENT AND RELATIVE MOVEMENT TAKES PLACE BETWEEN THE TAPE AND THE GATE IN A DIRECTION PARALLEL TO THE LENGTH OF THE TAPE, THE FLUX OF LIGHT IMPINGING ON THE ELEMENT VARIES IN DEPENDENCE ON THE SENSE OF SAID MOVEMENT.
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) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |