Patent US4945365A successfully refreshed from Google Patents.
Patent US3350940A successfully refreshed from Google Patents.
US3350940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Level measuring device
Assignee: Richardson Co
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Filing: 1965-05-12
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Granted: 1967-11-07
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Expires: 1985-05-12
Abstract
No abstract record available.
Inventors
- 👤 Leslie F Stone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:58
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/14; G01F23/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A MEASURING DEVICE FOR FINELY DIVIDED SOLID MATERIAL, SAID DEVICE COMPRISING A CONDUCTIVE ELEMENT FORMING A PART OF A SUPPORT EXTENDING SUBSTANTIALLY THE HEIGHT OF SAID CONTAINER, A FLEXIBLE COVERING FOR SAID CONDUCTIVE ELEMENT AND SECURED TO THE WALL, SAID FLEXIBLE COVERING CONTAINING A CARBON FILLER AS A RESISTIVE MEANS FOR CONDUCTING AN ELECTRICAL CURRENT, AND MEANS FOR NORMALLY MAINTAINING SAID FLEXIBLE COVERING IN SPACED RELATIONSHIP WITH RESPECT TO SAID CONDUCTIVE ELEMENT.
Claim 2
Dependent Claim
72 words
A MEASURING DEVICE FOR FINELY DIVIDED SOLID MATERIAL, SAID DEVICE COMPRISING A CONDUCTIVE ELEMENT FORMING A PART OF A SUPPORT EXTENDING SUBSTANTIALLY THE HEIGHT OF SAID CONTAINER, A FLEXIBLE COVERING FOR SAID CONDUCTIVE ELEMENT AND SECURED TO THE WALL, SAID FLEXIBLE COVERING CONTAINING A CARBON FILLER AS A RESISTIVE MEANS FOR CONDUCTING AN ELECTRICAL CURRENT, AND MEANS FOR NORMALLY MAINTAINING SAID FLEXIBLE COVERING IN SPACED RELATIONSHIP WITH RESPECT TO SAID CONDUCTIVE ELEMENT.
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) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |