US3458704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Angular position measuring device employing optical measurement of critical angle reflection between a reference point and a rotating data point
Assignee: US Philips Corp
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Filing: 1967-08-03
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Granted: 1969-07-29
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Expires: 1987-08-03
Abstract
No abstract record available.
Inventors
- 👤 Pieter G Cath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:48
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/59; G01N21/5907; G01N21/5911; G01D; G01D5/00; G01D5/26; G01D5/28; G01D5/30
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) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |