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US3025190A
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Method of, and compositions for use in, cleansing the interior surfaces of tanks and the like
Assignee: INTERNAT GROOM Co GmbH
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Filing: 1959-02-25
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Granted: 1962-03-13
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Expires: 1979-02-25
Abstract
No abstract record available.
Inventors
- 👤 Groom Reginald William
- 👤 Hartog Huibert Willem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:20
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/66; C11D1/72; B; B08; B08B; B08B9/00; B08B9/08; C02; C02F; C02F1/00; C02F1/68; C02F1/682; C11D7/00; C11D7/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A METHOD OF CLEANSING TANKS WHICH COMPRISES THE STEPS OF WASHING THE INTERIOR SURFACES OF SUCH TANKS WITH AN AQUEOUS CLEANSING LIQUID; PASSING THE MIXTURE OF CLEANSING LIQUID AND REMOVED OILY DEPOSITS TO A SEPARATING VESSEL; ALLOWING SUCH MIXTURE OT STRATIFY AND THE OIL AND THE AQUEOUS PHASES THEREOF TO SEPARATE IN THE PRESENCE OF A POLYGLYCOL ETHER HAVING A NEGATIVE SOLUBILITY COEFFICIENT WIH RESPECT TO SAID AQUEOUS PHASE, THE MIXTURE BEING MAINTAINED AT A TEMPERATURE OF AT LEAST AS HIGH AS THE CLOUD POINT OF THE AQUEOUS SOLUTION OF THE POLYGLYCOL EHTER AND THE AQUEOUS PHASE BEING MAINTAINED AT A PH NOT SUBSTANTIALLY EXCEEDING 7, WITHDRAWING THE SEPARATED OIL FROM THE SEPARATING VESSEL; AND RECYCLING AT LEAST THE MAJOR PART OF THE CLEANSING LIQUID FOR THE FURTHER TANK CLEANSING PURPOSE.
Claim 2
Independent Claim
131 words
A METHOD OF CLEANSING TANKS WHICH COMPRISES THE STEPS OF WASHING THE INTERIOR SURFACES OF SUCH TANKS WITH AN AQUEOUS CLEANSING LIQUID; PASSING THE MIXTURE OF CLEANSING LIQUID AND REMOVED OILY DEPOSITS TO A SEPARATING VESSEL; ALLOWING SUCH MIXTURE OT STRATIFY AND THE OIL AND THE AQUEOUS PHASES THEREOF TO SEPARATE IN THE PRESENCE OF A POLYGLYCOL ETHER HAVING A NEGATIVE SOLUBILITY COEFFICIENT WIH RESPECT TO SAID AQUEOUS PHASE, THE MIXTURE BEING MAINTAINED AT A TEMPERATURE OF AT LEAST AS HIGH AS THE CLOUD POINT OF THE AQUEOUS SOLUTION OF THE POLYGLYCOL EHTER AND THE AQUEOUS PHASE BEING MAINTAINED AT A PH NOT SUBSTANTIALLY EXCEEDING 7, WITHDRAWING THE SEPARATED OIL FROM THE SEPARATING VESSEL; AND RECYCLING AT LEAST THE MAJOR PART OF THE CLEANSING LIQUID FOR THE FURTHER TANK CLEANSING PURPOSE.
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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) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |