US3562676A
Expired / Lapsed
US
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Folded path perpendicular diffraction delay line
Assignee: Berkeley Heights
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Filing: 1967-12-18
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Granted: 1971-02-09
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Expires: 1987-12-18
Abstract
Abstract AN INTERMEDIARY GRADED GRATING IS POSITIONED IN THE BEAM PATH BETWEEN THE INPUT AND OUTPUT GRADED GRATINGS USUALLY FOUND IN A PERPENDICULAR DIFFRACTION DELAY LINE. THE INTERMEDIARY GRATING INTERCEPTS THE BEAMS AND REDIFFRACTS DESIRED ORDERS OF THEM TO THE OUTPUT GRATING AT ANGLES DIFFERENT FROM THEIR ANGLES OF INCIDENCE WITHOUT LOSS OF THE INHERENT AVERAGING PROPERTIES OF THE PERPENDICULAR DIFFRACTION DELAY LINE. THE INTERMEDIARY GRATING MAY BE EITHER REFLECTING OR TRANSMITTING.
Inventors
- 👤 Marsena R Parker Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:45
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/30; H03H9/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |