US3781407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inert gas system for a tanker
Assignee: Mitsubishi Kakoki Kaisha Ltd
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Filing: 1971-10-04
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Granted: 1973-12-25
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Expires: 1991-10-04
Abstract
Abstract AN INERT GAS FOR FLOODING COMPARTMENTS OR OTHER OIL CONTAINERS OF A TANKER OR OTHER VESSEL IS PRODUCED BY STRIPPING FLUE GAS OF ITS SO2 CONTENT WITH AN AQUEOUS SODIUM HYDROXIDE OR SODIUM CARBONATE SOLUTION IN A SCRUBBER, AND OXIDIZING THE RESULTING SODIUM SULFITE IN THE SOLUTION WITH ATMOSPHERIC OXYGEN IN THE SAME SCRUBBER, WHEREUPON A SODIUM SULFATE SOLUTION IS OBTAINED WHICH MAY BE DISCHARGED OVERBOARD WITHOUT DAMAGE TO MARINE LIFE.
Inventors
- 👤 T Kamijo
- 👤 D Nagakura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:09
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/004; A; A62; A62C; A62C3/00; A62C3/002; A62C3/07; A62C3/10; B; B01; B01D; B01D47/00; B01D47/06; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/50; B01D53/501; B63; B63B; B63B25/00; B63B25/02; B63B25/08; B63B25/10; C; C10; C10K; C10K1/00; C10K1/08; C10K1/10; A62C99/00; A62C99/0009; A62C99/0018; B01D2252/00; B01D2252/10; B01D2252/103; B01D2252/1035
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |