US3560970A
Expired / Lapsed
US
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Obstacle detector utilizing waveguide
Assignee: Hitachi Ltd
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Filing: 1968-09-13
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Granted: 1971-02-02
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Expires: 1988-09-13
Abstract
Abstract AN OBSTACLE DETECTING APPARATUS COMPRISING A LEAKY WAVEGUIDE HAVING BEAM DIRECTLY AND LEAKAGE APERTURE INSTALLED ALONG ONE SIDE OF THE PATH, ELECTROMAGNETIC WAVES BEING SUPPLIED THROUGH THE WAVEGUIDE, CAUSED TO LEAK OUT OF THE LEAKAGE APERTURE, AND REFLECTED WHEN THEY STRIKE ANY OBSTACLE IN THE PATH AND RE-ENTER THE WAVEGUIDE THROUGH THE LEAKAGE APERTURE TO BE SENSED BY AN APPROPRIATE MEANS TO DETECT THE PRESENCE AND POSITION OF THE OBSTACLE.
Inventors
- 👤 Masao Kamimura
- 👤 Mitsuru Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:42
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/10; B; B61; B61L; B61L1/00; B61L1/20; B61L23/00; B61L23/04; B61L23/041; G; G01; G01S; G01S13/00; G01S13/88; G01S13/93; G01S13/931; H01Q1/00; H01Q1/27; H01Q1/32; H01Q1/3208; H01Q1/3225; H01Q13/00; H01Q13/20; G01S2013/93185; G01S2013/9328; G01S2013/9329
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |