Patent US3606541A successfully refreshed from Google Patents.
US3606541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact-less probe system
Assignee: Mitsubishi Electric Corp
•
Filing: 1969-09-23
•
Granted: 1971-09-20
•
Expires: 1989-09-23
Abstract
Abstract A COLLIMATED LIGHT REFLECTED FROM AN OBJECT IS PASSED THROUGH A VIBRATING PINHOLE AND CONVERTED INTO AN AC AND A DC COMPONENT CONTROLLED IN GAIN WITH THE LIGHT INTENSITY. THE POLARITY OF THE AC COMPONENT IS PHASE DETECTED AND COOPERATES WITH THE LEVEL OF THE DC COMPONENT TO DETERMINE IF THE SYSTEM IS WITHIN IT OPERATIVE REGION. WHEN THE SYSTEM IS OUTSIDE THE OPERATIVE REGION, THE PHASE DETECTED COMPONENT AND THE DC LEVEL CAUSE THE SYSTEM TO ENTER THE OPERATIVE REGION. WHEN IN ITS OPERATIVE REGION, THE SYSTEM CONTROLLED BY THE PHASE DETECTED COMPONENT IS MAINTAINED IN A PREDETERMINED POSITION.
Inventors
- 👤 Tutomu Sugano
- 👤 Makoto Kikuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:22
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/02; G01B11/026; G01B11/24
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |