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Patent US3665301A successfully refreshed from Google Patents.
US3665301A
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Capacitance-type monitoring apparatus
Assignee: Drexelbrook Controls Inc
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Filing: 1968-12-24
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Granted: 1972-05-23
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Expires: 1988-12-24
Abstract
Abstract Capacitance-type monitoring apparatus for determining the composition of fluid mixtures and detecting the presence and amount of organic impurities in an aqueous stream is disclosed.
Inventors
- 👤 Frederick L Maltby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:32
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/22; G01N27/226
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
12 words
Apparatus of claim 1 wherein the measuring electrode has a streamlined configuration.
Claim 2
Dependent Claim
24 words
Apparatus of claim 1 which further includes a grounded electrode associated with a measuring electrode to thereby improve the sensitivity of the measuring electrode.
Claim 3
Dependent Claim
21 words
Apparatus of claim 3 wherein the grounded electrode is maintained at a potential substantially identical with that of the measuring electrode.
Claim 4
Dependent Claim
16 words
The apparatus of claim 1 in which oil is the organic fluid in the aqueous stream.
Claim 5
Dependent Claim
18 words
The apparatus of claim 5 in which the aqueous stream contains not more than 1 percent of oil.
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) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |