Patent EP0094179A2 successfully refreshed from Google Patents.
US2848299A
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Corrosion inhibition in water systems
Assignee: Veolia WTS USA Inc
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Filing: 1956-01-11
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Granted: 1958-08-19
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Expires: 1976-01-11
Abstract
No abstract record available.
Inventors
- 👤 Kahler Harry Lewis
- 👤 Chester A Bishof
- 👤 William A Tanzola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:26
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/18; C23F11/187; C23F11/188
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
THE PROCESS OF REDUCING THE CORROSION AND SLUDGING IN A COOLING WATER SYSTEM, WHICH SYSTEM CONTAINS METAL PARTS OF THE CLASS CONSISTING OF IRON, STEEL, COPPER BASE ALLOY AND ALUMINUM BASE ALLOY, AND WHICH SYSTEM CONTAINS IN THE WATER AT LEAST 1 P. P. M. OF ALUMINUM ION, WHICH COMPRISES ADDISNG TO THE WATER CONTAINING SUCH ALUMINUM ION AND IN CONTACT WITH SUCH METAL PARTS, WATER SOLUBLE FLUORIDE COMPOUND IN CONCENTRATION BETWEEN 10 AND 200 P. P. M. EXPRESSED AS SODIUM FLUORIDE AND WATER SOLUBLE CHROMATE COMPOUND IN CONCENTRATION BETWEEN 1 AND 200 P. P. M. EXPRESSED AS NA2-CR2-O7.2H2O, AND MAINTAINING IN THE WATER A PH BETWEEN 5 AND 8.
Claim 2
Dependent Claim
110 words
THE PROCESS OF REDUCING THE CORROSION AND SLUDGING IN A COOLING WATER SYSTEM, WHICH SYSTEM CONTAINS METAL PARTS OF THE CLASS CONSISTING OF IRON, STEEL, COPPER BASE ALLOY AND ALUMINUM BASE ALLOY, AND WHICH SYSTEM CONTAINS IN THE WATER AT LEAST 1 P. P. M. OF ALUMINUM ION, WHICH COMPRISES ADDISNG TO THE WATER CONTAINING SUCH ALUMINUM ION AND IN CONTACT WITH SUCH METAL PARTS, WATER SOLUBLE FLUORIDE COMPOUND IN CONCENTRATION BETWEEN 10 AND 200 P. P. M. EXPRESSED AS SODIUM FLUORIDE AND WATER SOLUBLE CHROMATE COMPOUND IN CONCENTRATION BETWEEN 1 AND 200 P. P. M. EXPRESSED AS NA2-CR2-O7.2H2O, AND MAINTAINING IN THE WATER A PH BETWEEN 5 AND 8.
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) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |