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Patent US3225191A successfully refreshed from Google Patents.
US3225191A
Expired / Lapsed
US
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Infrared liquid level inspection system
Assignee: Industrial Dynamics Co Ltd
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Filing: 1962-06-01
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Granted: 1965-12-21
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Expires: 1982-06-01
Abstract
No abstract record available.
Inventors
- 👤 Fredrick L Calhoun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:29
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/28; G01F23/284; G01F23/292; G01F23/2921
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
IN COMBINATION FOR INDICATING A PARTICULAR LEVEL OF LIQUID IN A CONTAINER HAVING CHARACTERISTIC OF PASSING ENERGY IN THE INFRARED BAND OF WAVELENGTHS WHERE THE LIQUID HAS PROPERTIES OF BLOCKING THE PASSAGE OF ENERGY AT WAVELENGTHS IN THE INFRARED BAND AT WAVELENGTHS ABOVE THE INFRARED BAND, MEANS DISPOSED RELATIVE TO THE CONTAINER FOR DIRECTING ENERGY IN THE INFRARED BAND TOWARD THE CONTAINER, MEANS DISPOSED RELATIVE TO THE CONTAINER FOR RECEIVING THE ENERGY PASSING FROM THE CONTAINER AT SUBSTANTIALLY THE PARTICULAR LEVEL AND HAVING CHARACTERISTICS FOR BLOCKING ENERGY IN A RANGE OF WAVELENGTHS BELOW THE INFRARED BOND AND FOR PRODUCING SIGNALS IN ACCORDANCE WITH THE OCCURRENCE OF ENERGY IN THE INFRARED BAND, AND MEANS RESPONSIVE TO THE SIGNALS PRODUCED BY THE LAS MENTIONED MEANS FOR INDICATING WHETHER THE LIQUID IS AT THE PARTICULAR LEVEL IN THE CONTAINER.
Claim 2
Dependent Claim
136 words
IN COMBINATION FOR INDICATING A PARTICULAR LEVEL OF LIQUID IN A CONTAINER HAVING CHARACTERISTIC OF PASSING ENERGY IN THE INFRARED BAND OF WAVELENGTHS WHERE THE LIQUID HAS PROPERTIES OF BLOCKING THE PASSAGE OF ENERGY AT WAVELENGTHS IN THE INFRARED BAND AT WAVELENGTHS ABOVE THE INFRARED BAND, MEANS DISPOSED RELATIVE TO THE CONTAINER FOR DIRECTING ENERGY IN THE INFRARED BAND TOWARD THE CONTAINER, MEANS DISPOSED RELATIVE TO THE CONTAINER FOR RECEIVING THE ENERGY PASSING FROM THE CONTAINER AT SUBSTANTIALLY THE PARTICULAR LEVEL AND HAVING CHARACTERISTICS FOR BLOCKING ENERGY IN A RANGE OF WAVELENGTHS BELOW THE INFRARED BOND AND FOR PRODUCING SIGNALS IN ACCORDANCE WITH THE OCCURRENCE OF ENERGY IN THE INFRARED BAND, AND MEANS RESPONSIVE TO THE SIGNALS PRODUCED BY THE LAS MENTIONED MEANS FOR INDICATING WHETHER THE LIQUID IS AT THE PARTICULAR LEVEL IN THE CONTAINER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |