US2999732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inhibiting corrosion in water systems with phosphate-chromate-edta compositions
Assignee: Veolia WTS USA Inc
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Filing: 1957-01-09
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Granted: 1961-09-12
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Expires: 1977-01-09
Abstract
No abstract record available.
Inventors
- 👤 Kahler Harry Lewis
- 👤 Charles B George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:07
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
THE PROCESS OF INHIBITING CORROSION OF METALLIC PARTS IN AN INDUSTRIAL WATER SYSTEM, WHICH COMPRISES INTRODUCING INTO THE WATER FROM 1 TO 1000 P.P.M. OF WATER SOLUBLE PHOSPHATE, INTRODUCING INTO THE WATER FROM 0.1 TO 100 P.P.M. CALCULATED AS METAL ION OF A COMPOUND OF TRIVALENT CHROMIUM, INTRODUCING INTO THE WATER FROM 1 TO 100 P.P.M. OF AN AMINO CARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim
67 words
THE PROCESS OF INHIBITING CORROSION OF METALLIC PARTS IN AN INDUSTRIAL WATER SYSTEM, WHICH COMPRISES INTRODUCING INTO THE WATER FROM 1 TO 1000 P.P.M. OF WATER SOLUBLE PHOSPHATE, INTRODUCING INTO THE WATER FROM 0.1 TO 100 P.P.M. CALCULATED AS METAL ION OF A COMPOUND OF TRIVALENT CHROMIUM, INTRODUCING INTO THE WATER FROM 1 TO 100 P.P.M. OF AN AMINO CARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF
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) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |