Patent US1827842A successfully refreshed from Google Patents.
US3783689A
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Discrete level detector
Assignee: METRITAPE
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Filing: 1970-03-24
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Granted: 1974-01-08
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Expires: 1990-03-24
Abstract
Abstract A LEVEL INDICATOR FOR INDICATING THE PRESENCE OR ABSENCE OF A FLUENT MATERIAL AT A DISCRETE POSITION. AN ELONGATED SENSING ELEMENT IS PROVIDED WHICH IS OPERATIVE IN THE PRESENCE OF SURROUNDING PRESSURE TO ACTUATE ONE OR MORE REDUCTANT CONTACTS INTEGRALLY FORMED THEREWITH AND WHICH IS ISOLATED FROM THE WORKING ENVIRONMENT. D R A W I N G
Inventors
- 👤 A Ehrenfried
- 👤 N Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:47
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/14; G01F23/18; G01F23/185
Claims Analysis
Total Claims: 0
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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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |