Patent US3500055A successfully refreshed from Google Patents.
US3500055A
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Multitrack optical grating for providing phase-displaced waveforms indicative of the position of a movable object
Assignee: National Research Development Corp UK
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Filing: 1966-11-30
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Granted: 1970-03-10
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Expires: 1986-11-30
Abstract
No abstract record available.
Inventors
- 👤 Alexander Russell
- 👤 Leonard A Sayce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:11
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/26; G01D5/32; G01D5/34; G01D5/347; G01D5/34776; G01D5/34784; G01D5/36; G01D5/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3076374A
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US3153111A
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US3114046A
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US3285123A
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US3223845A
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US3351768A
Cited
US3303347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |