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Patent US3029202A successfully refreshed from Google Patents.
US3029202A
Expired / Lapsed
US
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Treating waste water
Assignee: Universal Oil Products Co
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Filing: 1960-04-19
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Granted: 1962-04-10
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Expires: 1980-04-19
Abstract
No abstract record available.
Inventors
- 👤 Kenneth M Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:04
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/72; C02F1/725
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
IN THE COOLING OF WATER BY COUNTERCURRENT CONTACT WITH ASCENDING AIR WHILE THE WATER IS DESCENDING THROUGH A COOLING TOWER MAINTAINED AT A TEMPERATURE OF FROM ABOUT 80* TO ABOUT 130*F., SAID WATER CONTAINING AN INORGANIC SULFIDE IMPURITY IN A CONCENTRATION OF LESS THAN 5% BY WEIGHT, THE METHOD OF REDUCING THE OXYGEN DEMAND OF SAID WATER WHICH COMPRISES EFFECTING SAID COOLING AND CONTACT OF THE WATER WITH AIR IN THE PRESENCE OF A PHTHALOCYANINE CATALYST.
Claim 2
Dependent Claim
76 words
IN THE COOLING OF WATER BY COUNTERCURRENT CONTACT WITH ASCENDING AIR WHILE THE WATER IS DESCENDING THROUGH A COOLING TOWER MAINTAINED AT A TEMPERATURE OF FROM ABOUT 80* TO ABOUT 130*F., SAID WATER CONTAINING AN INORGANIC SULFIDE IMPURITY IN A CONCENTRATION OF LESS THAN 5% BY WEIGHT, THE METHOD OF REDUCING THE OXYGEN DEMAND OF SAID WATER WHICH COMPRISES EFFECTING SAID COOLING AND CONTACT OF THE WATER WITH AIR IN THE PRESENCE OF A PHTHALOCYANINE CATALYST.
References Cited (Backward Citations)
US2859766A
Cited
US2882224A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |