US3753654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for determining organic materials in water
Assignee: Shell USA Inc
•
Filing: 1971-07-14
•
Granted: 1973-08-21
•
Expires: 1991-07-14
Abstract
Abstract A method for estimating the amount and volatility of organic materials in contaminated water samples wherein a sample of the contaminated water is moved into a heated furnace and the vapors swept directly into a flame-ionization detector.
Inventors
- 👤 F Eggertsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:23
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/18; G01N33/1826; G01N33/1846; G01N27/00; G01N27/62; G01N27/626; G01N31/00; G01N31/12; Y; Y10; Y10T; Y10T436/00; Y10T436/20; Y10T436/203332
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
18 words
The method of claim 1 wherein an inert gas is used to convey the sample through the furnace.
Claim 2
Dependent Claim
39 words
The method of claim 1 wherein the temperature of the furnace is maintained at 50* to 180*C when said water is supplied to said furnace and raised to about 500* to 800*C when said residual organic matter is volatilized.
Claim 3
Dependent Claim
18 words
The method of claim 1 wherein the detector is a hydrogen flame ionization detector maintained at above 300*C.
Claim 4
Dependent Claim
11 words
The method of claim 1 wherein the carrier gas is hydrogen.
References Cited (Backward Citations)
US3567391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |