US3428074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid detector
Assignee: Hectronic AG
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Filing: 1966-08-25
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Granted: 1969-02-18
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Expires: 1986-08-25
Abstract
No abstract record available.
Inventors
- 👤 Benno Perren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:30
CPC Classifications
B; B65; B65D; B65D90/00; B65D90/48; B65D90/50; B65D90/51; B65D90/511; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3006; Y10T137/5762; Y10T137/8158
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
APPARATUS FOR ASCERTAINING THE PRESENCE OF A CERTAIN LIQUID TO BE CONTROLLED, PARTICULARLY AT A POINT WHICH CANNOT BE OBSERVED, CHARACTERIZED BY A LIQUID DECTECTOR WHICH COMPRISES A FLOAT, AND A FEELER MOUNTED ON SAID FLOAT, WHICH FEELER RESPONDS TO THE WETTING EFFECT OF A LIQUID AND WHICH FLOATS HAS A SPECIFIC WEIGHT THAT IS ADJUSTABLE WHEREBY THE FEELER SINKS IN THE LIQUID WHICH IS TO BE CONTROLLED BUT IS MAINTAINED ABOVE THE LEVEL OF LIQUIDS WHICH HAVE HIGHER SPECIFIC WEIGHTS.
Claim 2
Dependent Claim
81 words
APPARATUS FOR ASCERTAINING THE PRESENCE OF A CERTAIN LIQUID TO BE CONTROLLED, PARTICULARLY AT A POINT WHICH CANNOT BE OBSERVED, CHARACTERIZED BY A LIQUID DECTECTOR WHICH COMPRISES A FLOAT, AND A FEELER MOUNTED ON SAID FLOAT, WHICH FEELER RESPONDS TO THE WETTING EFFECT OF A LIQUID AND WHICH FLOATS HAS A SPECIFIC WEIGHT THAT IS ADJUSTABLE WHEREBY THE FEELER SINKS IN THE LIQUID WHICH IS TO BE CONTROLLED BUT IS MAINTAINED ABOVE THE LEVEL OF LIQUIDS WHICH HAVE HIGHER SPECIFIC WEIGHTS.
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) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |