Patent DD221354B1 successfully refreshed from Google Patents.
US3588462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fringe interpolator and counter
Assignee: ACU-RITE Inc
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Filing: 1966-12-23
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Granted: 1971-06-28
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Expires: 1986-12-23
Abstract
Abstract APPARATUS FOR DETERMINING THE EXTENT AND DIRECTION OF MOVEMENT OF A MOVABLE MEMBER RELATIVE TO A STATIONARY MEMBER AND MORE PARTICULARLY TO APPARATUS ADAPTED TO BE USED IN CONJUNCTION WITH OPTICAL FRINGE PATTERN GENERATING DEVICES FOR PRECISELY MEASURING MINUTE MOVEMENTS IN THE FRINGE PATTERN.
Inventors
- 👤 Kurt H Kreckel
- 👤 Kallis H Mannik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:33
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/26; G01D5/32; G01D5/34; G01D5/36; G01D5/38; H; H03; H03K; H03K5/00; H03K5/22; H03K5/26; H03M; H03M1/00; H03M1/06; H03M1/08
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |