US3790345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detection of decontamination of water
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1971-07-19
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Granted: 1974-02-05
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Expires: 1991-07-19
Abstract
Abstract Contamination of one aqueous stream by a second such stream, e.g., through leakage in a heat exchanger, is detected by providing phenol in the second stream and analysing for the presence of phenol in the first stream.
Inventors
- 👤 G Mansfield
- 👤 W Lyth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:14
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; G01M; G01M3/00; G01M3/02; G01M3/04; G01M3/20; G01M3/22; G01M3/226; G01M3/228; Y; Y10; Y10T; Y10T436/00; Y10T436/20; Y10T436/203332
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A process as claimed in claim 1 wherein the phenol is selected from the group consisting of phenol and ortho- and meta-substituted phenols.
Claim 2
Dependent Claim
24 words
The process of claim 1 wherein phenol is also separately added to the impure water to bring the phenol concentration to the desired level.
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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |