US3294680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of spent cooling waters
Assignee: LANCY LAB
•
Filing: 1964-11-18
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Granted: 1966-12-27
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Expires: 1984-11-18
Abstract
No abstract record available.
Inventors
- 👤 Leslie E Lancy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:26
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/083; C02F2101/00; C02F2101/10; C02F2101/20; C02F2101/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A SELF-REGULATING METHOD OF QUICKLY AND EFFECTIVELY CONDITIONING SPENT COOLING WATER HAVING A TOXIC HEXAVALENT CHROMIUM SOLUTION CONTENT TO MAKE THE WATER INNOCUOUS WHICH COMPRISES, PROVIDING A MASS OF HARD METAL SULFIDE GRANULES, MOVING THE SPENT COOLING WATER THROUGH THE MASS IN CONTACT WITH SURFACES PORTIONS OF THE GRANULES AND SURFACE-REACTING THE GRANULES WITH THE HEXAVALENT CHROMIUM SOLUTION CONTENT TO FULLY CONVERT IT INTO TRIVALENT CHROMIUM, WHILE INHIBITING THE FORMING OF A SOLUBLE SULFIDE IN THE WATER FROM THE SULFIDE GRANULES, AND WHILE MAINTAINING SURFACES OF THE METAL SYLFIDE GRANULES REACCTIVE TO THE HEXAVALENT CHROMIUM SOLUTION CONTENT OF THE WATER, AND REMOVING THE WATER IN AN INNOCUOUS CONDITION FROM THE MASS AND DISCHARGING IT.
Claim 2
Dependent Claim
114 words
A SELF-REGULATING METHOD OF QUICKLY AND EFFECTIVELY CONDITIONING SPENT COOLING WATER HAVING A TOXIC HEXAVALENT CHROMIUM SOLUTION CONTENT TO MAKE THE WATER INNOCUOUS WHICH COMPRISES, PROVIDING A MASS OF HARD METAL SULFIDE GRANULES, MOVING THE SPENT COOLING WATER THROUGH THE MASS IN CONTACT WITH SURFACES PORTIONS OF THE GRANULES AND SURFACE-REACTING THE GRANULES WITH THE HEXAVALENT CHROMIUM SOLUTION CONTENT TO FULLY CONVERT IT INTO TRIVALENT CHROMIUM, WHILE INHIBITING THE FORMING OF A SOLUBLE SULFIDE IN THE WATER FROM THE SULFIDE GRANULES, AND WHILE MAINTAINING SURFACES OF THE METAL SYLFIDE GRANULES REACCTIVE TO THE HEXAVALENT CHROMIUM SOLUTION CONTENT OF THE WATER, AND REMOVING THE WATER IN AN INNOCUOUS CONDITION FROM THE MASS AND DISCHARGING IT.
References Cited (Backward Citations)
US1932531A
Cited
US2110187A
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US2977202A
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US3023089A
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US3027321A
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US3218252A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |