US4125822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Probe for determining organic liquids
Assignee: Individual
•
Filing: 1975-10-20
•
Granted: 1978-11-14
•
Expires: 1995-10-20
Abstract
Abstract The presence of an organic liquid is detected by means of a probe which comprises a rubber-like material which is swellable in an organic liquid, which rubber-like material has electrically-conductive solid particles distributed therethrough, in such concentration as to touch each other.
Inventors
- 👤 Benno Perren
- 👤 Herbert Schreiber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:50
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12; G01N27/125; G01N27/126; G01M; G01M3/00; G01M3/02; G01M3/04; G01M3/042; G01M3/045; H; H01; H01B; H01B3/00; H01B3/002; H01B3/004; Y; Y10; Y10T; Y10T436/00; Y10T436/21
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
81 words
A probe for determining the presence of mineral oil, which comprises: a plastics material which is swellable on contact with mineral oil, and solid particles finely distributed through said material and present therein in such concentration as to touch each other, said solid particles being less than 1.0 mm in diameter and having a surface conductivity of the order of a metal, at least at the surface thereof the probe comprises an adsorption material having a preferential attraction toward mineral oil.
Claim 2
Dependent Claim
81 words
A probe for determining the presence of mineral oil, which comprises: a plastics material which is swellable on contact with mineral oil, and solid particles finely distributed through said material and present therein in such concentration as to touch each other, said solid particles being less than 1.0 mm in diameter and having a surface conductivity of the order of a metal, at least at the surface thereof the probe comprises an adsorption material having a preferential attraction toward mineral oil.
Claim 3
Dependent Claim
25 words
A probe as defined in claim 1, wherein the adsorption material consists of grains of active carbon having a thin metallic deposit on surfaces thereof.
References Cited (Backward Citations)
US2589983A
Cited
US2626381A
Cited
DE1179024B
Cited
US3295088A
Cited
US3479864A
Cited
US3800219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-13 | 1982-05-15 | 1982-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-13 | 1986-05-15 | 1986-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-13 | 1990-05-15 | 1990-11-14 | $7700.00 | Window Closed / Lapsed |