US3588859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Level detector
Assignee: Individual
•
Filing: 1969-04-21
•
Granted: 1971-06-28
•
Expires: 1989-04-21
Abstract
Abstract THERE IS DISCLOSED A DEVICE FOR ATTACHMENT TO THE OUTSIDE OF AN INTRAVENOUS BAG OR BOTTLE FOR INDICATING WHEN THE BAG OR BOTTLE HAS BECOME NEARLY EMPTY AND REQUIRES REPLACEMENT. THE DEVICE INCLUDES A CAPACITANCE BRIDGE MADE UP OF DISTRIBUTED CAPACITANCES, TWO OF THE CAPACITANCES IN THE BRIDGE BEING FORMED WITH THE FLUID IN THE BOTTLE. WHEN THE FLUID REACHES A PRESELECTED LEVEL, THE OUTPUT FROM THE BRIDGE ACTIVATES THE NURSES'' CALL SYSTEM OR OTHER ALARM.
Inventors
- 👤 Frank Petree
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:27
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/26; G01F23/263; G01F23/265; A; A61; A61M; A61M5/00; A61M5/14; A61M5/168; A61M5/16831; A61M5/1684; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7306
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |