US3634232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for removing dissolved oxygen from aqueous fluids
Assignee: Shell USA Inc
•
Filing: 1970-03-23
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Granted: 1972-01-11
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Expires: 1990-03-23
Abstract
Abstract DISSOLVED OXYGEN IS REMOVED FROM AQUEOUS FLUIDS BY INCORPORATING THEREIN VERY MINOR AMOUNTS EACH OF SULFITE ION AND A PEROXIDE COMPOUND.
Inventors
- 👤 Arthur K Dunlop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:36
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 0
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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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |