US3218265A
Expired / Lapsed
US
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Monovalent bis(aromatic hydrocarbon) chromium cations as corrosion inhibitors
Assignee: Union Carbide Corp
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Filing: 1962-06-28
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Granted: 1965-11-16
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Expires: 1982-06-28
Abstract
No abstract record available.
Inventors
- 👤 Donald R Rink
- 👤 Eugene A Zientek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:52
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C10; C10M; C10M2201/00; C10M2201/02; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2219/00; C10M2219/04; C10M2227/00; C10M2227/08; C10M2227/081; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2010/00; C10N2010/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A METHOD OF INHIBITING CORROSION OF METALS BY A CORROSIVE LIQUID SOLUTION HAVING A PH VALUE FROM ABOUT 7 TO ABOUT 12.5 IN CONTACT WITH SUCH METALS WHICH COMPRISES DISSOLVING IN SAID LIQUID SOLUTION IN AN AMOUNT BETWEEN ABOUT 0.1 PERCENT BY WEIGHT AND ABOUT 10 PERCENT BY WEIGHT BASED ON THE WEIGHT OF SAID LIQUID SOLUTION A SALT OF A MONOVALENT BIS(AROMATIC HYDROCARBON) CHROMIUM CATION REPRESENTED BY THE FORMULA
Claim 2
Independent Claim
70 words
A METHOD OF INHIBITING CORROSION OF METALS BY A CORROSIVE LIQUID SOLUTION HAVING A PH VALUE FROM ABOUT 7 TO ABOUT 12.5 IN CONTACT WITH SUCH METALS WHICH COMPRISES DISSOLVING IN SAID LIQUID SOLUTION IN AN AMOUNT BETWEEN ABOUT 0.1 PERCENT BY WEIGHT AND ABOUT 10 PERCENT BY WEIGHT BASED ON THE WEIGHT OF SAID LIQUID SOLUTION A SALT OF A MONOVALENT BIS(AROMATIC HYDROCARBON) CHROMIUM CATION REPRESENTED BY THE FORMULA
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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |