Patent US2944924A successfully refreshed from Google Patents.
US2944924A
Expired / Lapsed
US
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Method of cleaning storage and transport tanks, especially ships' tanks, from oil, fat, wax and the like
Assignee: Uddeholms AB
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Filing: 1957-11-05
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Granted: 1960-07-12
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Expires: 1977-11-05
Abstract
No abstract record available.
Inventors
- 👤 Wiklundh Leif Sven-Erik
- 👤 Persson Sven Helmer
- 👤 Holm Kurt Anders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:02
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/50; C11D7/5004; C11D7/5018; B; B08; B08B; B08B9/00; B08B9/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
THE METHOD OF INTERNALLY CLEANING A SUBSTANTIALLY EMPTY OIL TANK WHICH COMPRISES THE STEPS OF INTRODUCING STEAM INTO A VAPORIZER CONTAINING A SOLVENT TO VAPORIZE THE SAME AND TO FORM A GASEOUS MIXTURE OF STEAM AND SOLVENT VAPOR, SAID SOLVENT IN ITS GASEOUS STATE BEING HEAVIER THAN AIR, INTRODUCING SAID GASEOUS MIXTURE INTO THE TANK NEAR ITS BOTTOM, REMOVING FROM THE TANK THE CONDENSATE AND THE OIL DISSOLVED THEREIN, SEPARTING WATER FROM SAID CONDENSATE, RETURNING THE REMAINING CONDENSATE, AND THE OIL DISSOLVED THEREIN TO SAID VAPORIZER, VAPORIZING THE SOLVENT COMPONENT OF SAID CONDENSATE, AND REMOVING THE OIL FROM SAID VAPORIZER.
Claim 2
Independent Claim
100 words
THE METHOD OF INTERNALLY CLEANING A SUBSTANTIALLY EMPTY OIL TANK WHICH COMPRISES THE STEPS OF INTRODUCING STEAM INTO A VAPORIZER CONTAINING A SOLVENT TO VAPORIZE THE SAME AND TO FORM A GASEOUS MIXTURE OF STEAM AND SOLVENT VAPOR, SAID SOLVENT IN ITS GASEOUS STATE BEING HEAVIER THAN AIR, INTRODUCING SAID GASEOUS MIXTURE INTO THE TANK NEAR ITS BOTTOM, REMOVING FROM THE TANK THE CONDENSATE AND THE OIL DISSOLVED THEREIN, SEPARTING WATER FROM SAID CONDENSATE, RETURNING THE REMAINING CONDENSATE, AND THE OIL DISSOLVED THEREIN TO SAID VAPORIZER, VAPORIZING THE SOLVENT COMPONENT OF SAID CONDENSATE, AND REMOVING THE OIL FROM SAID VAPORIZER.
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) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |