Patent US4414142A successfully refreshed from Google Patents.
Patent US3222291A successfully refreshed from Google Patents.
US3222291A
Expired / Lapsed
US
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Corrosion inhibition compositions
Assignee: Pfaudler Permutit Inc
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Filing: 1962-09-11
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Granted: 1965-12-07
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Expires: 1982-09-11
Abstract
No abstract record available.
Inventors
- 👤 Allyn H Heit
- 👤 Calmon Calvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:00
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A COMPOSITION FOR INHIBITING CORROSION OF BOTH CUPRO-METALS AND FERROUS METALS IN CONTACT WITH THE SAME AQUEOUS SOLUTION AT TEMPERATURES ABOVE ABOUT 140* F. CONSISTING ESSENTIALLY OF FROM ABOUT 45 TO 55 P.P.M. OF SODIUM POLYPHOSPHATE HAVING THE FORMULA NA6P4O13; FROM ABOUT 2 TO 10 P.P.M. OF SODIUM MERCAPTOBENZOTHIAZOLE; FROM ABOUT 1 TO 10 P.P.M. OF AT LEAST ONE WATER SOLUBLE QUATERNARY AMINE SELECTED FROM THE CLASS CONSISTING OF N-ALKYL DIMETHYL 1-NAPTHYL METHYL AMMONIUM CHLORIDE MONOHYDRATE WHERE THE ALKYL GROUP CONTAINS 10 TO 14 CARBON ATOMS AND METHYL DODECYLBENZYL TRIMETHYL AMMONIUM CHLORIDE: AND FROM ABOUT 1 TO 10 P.P.M. OF WATER SOLUBLE GLYCOL SELECTED FROM THE CLASS CONSISTING OF 1-HYDROXY CYCLOHEXYL HYDROXYMETHYLICOBUTYLACETYLENE, BIS(1-HYDROXY CYCLOHEXYL) ACETHYLENE AND A COPOLYMER OF 20% POLYOXPROPYLENE AND 80% POLYOXYETHYLENE HAVING A MOLECULAR WEIGHT OF ABOUT 8760.
Claim 2
Dependent Claim
131 words
A COMPOSITION FOR INHIBITING CORROSION OF BOTH CUPRO-METALS AND FERROUS METALS IN CONTACT WITH THE SAME AQUEOUS SOLUTION AT TEMPERATURES ABOVE ABOUT 140* F. CONSISTING ESSENTIALLY OF FROM ABOUT 45 TO 55 P.P.M. OF SODIUM POLYPHOSPHATE HAVING THE FORMULA NA6P4O13; FROM ABOUT 2 TO 10 P.P.M. OF SODIUM MERCAPTOBENZOTHIAZOLE; FROM ABOUT 1 TO 10 P.P.M. OF AT LEAST ONE WATER SOLUBLE QUATERNARY AMINE SELECTED FROM THE CLASS CONSISTING OF N-ALKYL DIMETHYL 1-NAPTHYL METHYL AMMONIUM CHLORIDE MONOHYDRATE WHERE THE ALKYL GROUP CONTAINS 10 TO 14 CARBON ATOMS AND METHYL DODECYLBENZYL TRIMETHYL AMMONIUM CHLORIDE: AND FROM ABOUT 1 TO 10 P.P.M. OF WATER SOLUBLE GLYCOL SELECTED FROM THE CLASS CONSISTING OF 1-HYDROXY CYCLOHEXYL HYDROXYMETHYLICOBUTYLACETYLENE, BIS(1-HYDROXY CYCLOHEXYL) ACETHYLENE AND A COPOLYMER OF 20% POLYOXPROPYLENE AND 80% POLYOXYETHYLENE HAVING A MOLECULAR WEIGHT OF ABOUT 8760.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |