US3559663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for controlling sulfur concentration in ammonia
Assignee: ConocoPhillips Co
•
Filing: 1969-11-25
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Granted: 1971-02-02
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Expires: 1989-11-25
Abstract
Abstract It is disclosed that the conductivity of a sulfur in ammonia solution is a measure of the sulfur concentration and that sulfur in ammonia solution of predetermined concentration can be continuously prepared by monitoring the conductivity of such solution and controlling at least one feed stream responsive to such monitoring.
Inventors
- 👤 Richard L Every
- 👤 Paul F Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:12
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/64; G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/06; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/034; Y10T137/2496; Y10T137/2499; Y10T137/2509
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
The method of claim 1 wherein the rate of addition of sulfur or a sulfur-containing gas is controlled responsive to said changes in electrical conductivity.
Claim 2
Dependent Claim
21 words
The method of claim 1 wherein the rate of addition of ammonia is controlled responsive to said changes in electrical conductivity.
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |