US3192392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric apparatus to detect liquid level
Assignee: Thermal Syndicate Ltd
•
Filing: 1963-03-05
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Granted: 1965-06-29
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Expires: 1983-03-05
Abstract
No abstract record available.
Inventors
- 👤 William C Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:36
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/28; G01F23/284; G01F23/292; G01F23/2921; G01F23/2922; G01F23/2925
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
90 words
A LIQUID DETECTING DEVICE, COMPRISING AN ELONGATED TRANSPARENT TUBE OF UNIFORM CROSS-SECTION HAVING A WALL, AN OUTER SURFACE AND AN AXIS, SAID TUBE BEING CLOSED AT ONE END AND HAVING A PLURALITY OF GROOVES FORMED IN SAID TUBE SPACED FROM EACH OTHER AND FROM THE CLOSED END OF SAID TUBE AND INDENTING THE OUTER SURFACE OF THE SAID TUBE, EACH OF SAID GROOVES HAVING A MEDIAN PLANE NORMAL TO THE AXIS OF SAID TUBE AND A REFLECTING SURFACE CONVERGING TOWARD THE AXIS OF SAID TUBE IN A DIRECTION TOWARD THE
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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) | 1968-06-28 | 1968-12-28 | 1969-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-28 | 1972-12-28 | 1973-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-28 | 1976-12-28 | 1977-06-29 | $7700.00 | Window Closed / Lapsed |