Patent US3184969A successfully refreshed from Google Patents.
US3184969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level indication system
Assignee: SPX Technologies Inc
•
Filing: 1963-06-10
•
Granted: 1965-05-25
•
Expires: 1983-06-10
Abstract
No abstract record available.
Inventors
- 👤 Norman A Bolton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:18
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/28; G01F23/296; G01F23/2962; G01S; G01S15/00; G01S15/02; G01S15/06; G01S15/08; G01S15/10; G01S15/14; G01S7/00; G01S7/52; G01S7/52004; Y; Y10; Y10S; Y10S367/00; Y10S367/902; Y10S367/908
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
A LIQUID LEVEL-INDICATION SYSTEM FOR INDICATING CONTINUOUSLY THE LEVEL OF LIQUID IN A TANK COMPRISING, MEANS FOR PRODUCING A SUCCESSION OF ENERGY PULSES, MEANS FOR DETECTING PARTS OF THE ENERGY PULSES REFLECTED FROM BOTH THE LIQUID SURFACE SPACED FROM THE PRODUCING MEANS AND A FIXED REFLECTIVE SURFACE POSITIONED THEREBETWEEN, SIGNAL PRODUCING MEANS COUPLED TO THE PULSE PRODUCING AND PULSE PROTECTING MEANS FOR PRODUCING A FIRST SIGNAL IN RESPONSE TO THE ELASPED TIME BETWEEN PRODUCTION OF ANY ENERGY PULSE AND THE DETECTION OF A PORTION THEREOF REFLECTED FROM SAID FIXED REFLECTIVE SURFACE AND A SECOND SIGNAL IN RESPONSE TO THE ELASPED TIME BETWEEN THE PRODUCTION OF SAID ENERGY PULSE AND THE DETECTION OF A PORTION THEREOF REFLECTED FROM THE LIQUID SURFACE, CIRCUIT MEANS RESPONSIVE TO SAID SIGNAL PRODUCING MEANS FOR PROVIDING AN OUTPUT SIGNAL CORRESPONDING TO SAID FIRST SIGNAL MODIFIED BY SAID SECOND SIGNAL, AND LIQUID LEVEL INDICATION MEANS RESPONSIVE TO SAID CIRCUIT MEANS FOR INDICATING THE LEVEL OF LIQUID IN SAID TANK.
Claim 2
Dependent Claim
162 words
A LIQUID LEVEL-INDICATION SYSTEM FOR INDICATING CONTINUOUSLY THE LEVEL OF LIQUID IN A TANK COMPRISING, MEANS FOR PRODUCING A SUCCESSION OF ENERGY PULSES, MEANS FOR DETECTING PARTS OF THE ENERGY PULSES REFLECTED FROM BOTH THE LIQUID SURFACE SPACED FROM THE PRODUCING MEANS AND A FIXED REFLECTIVE SURFACE POSITIONED THEREBETWEEN, SIGNAL PRODUCING MEANS COUPLED TO THE PULSE PRODUCING AND PULSE PROTECTING MEANS FOR PRODUCING A FIRST SIGNAL IN RESPONSE TO THE ELASPED TIME BETWEEN PRODUCTION OF ANY ENERGY PULSE AND THE DETECTION OF A PORTION THEREOF REFLECTED FROM SAID FIXED REFLECTIVE SURFACE AND A SECOND SIGNAL IN RESPONSE TO THE ELASPED TIME BETWEEN THE PRODUCTION OF SAID ENERGY PULSE AND THE DETECTION OF A PORTION THEREOF REFLECTED FROM THE LIQUID SURFACE, CIRCUIT MEANS RESPONSIVE TO SAID SIGNAL PRODUCING MEANS FOR PROVIDING AN OUTPUT SIGNAL CORRESPONDING TO SAID FIRST SIGNAL MODIFIED BY SAID SECOND SIGNAL, AND LIQUID LEVEL INDICATION MEANS RESPONSIVE TO SAID CIRCUIT MEANS FOR INDICATING THE LEVEL OF LIQUID IN SAID TANK.
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) | 1968-05-24 | 1968-11-23 | 1969-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-24 | 1972-11-23 | 1973-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-24 | 1976-11-23 | 1977-05-25 | $7700.00 | Window Closed / Lapsed |