Patent US2801979A successfully refreshed from Google Patents.
US2801979A
Expired / Lapsed
US
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Inhibitor in acid pickling
Assignee: Individual
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Filing: 1954-09-01
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Granted: 1957-08-06
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Expires: 1974-09-01
Abstract
No abstract record available.
Inventors
- 👤 Karl F Hager
- 👤 Josef M Michel
- 👤 Rosenthal Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:45
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/04; C23G1/06; C23G1/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
AN ACID BATH FOR PICKLING FERROUS METALS CONTAINING AS AN INHIBITOR TO REPRESS ITS ETCHING AND AIR-CORROSIVE PROPERTIES TOWARDS SAID METALS BETWEEN ABOUT 0.01 AND 0.1% OF ITS WEIGHT OF A COMPOUND HAVING THE FORMULA RI-S02-NH-R2-COOR3 IN WHICH RI IS A SATURATED ALIPHATIC RADICAL WITHA CHAIN LENGTH OF FROM 12 TO 18 CARBON ATOMS, R2 IS A MEMBER OF THE GROUP CONSISTING OF ARYL RADICALS AND ALKYL RADICALS OF THE FORMULA -CNH2N- WHERE N IS A SMALL POSITIVE INTEGER AND R3 IS A MEMBER OF THE GROUP CONSISTING OF HYDROGEN ALKALI METAL, AMMONIUM AND CYCLOHEXYLAMINE IONS.
Claim 2
Dependent Claim
96 words
AN ACID BATH FOR PICKLING FERROUS METALS CONTAINING AS AN INHIBITOR TO REPRESS ITS ETCHING AND AIR-CORROSIVE PROPERTIES TOWARDS SAID METALS BETWEEN ABOUT 0.01 AND 0.1% OF ITS WEIGHT OF A COMPOUND HAVING THE FORMULA RI-S02-NH-R2-COOR3 IN WHICH RI IS A SATURATED ALIPHATIC RADICAL WITHA CHAIN LENGTH OF FROM 12 TO 18 CARBON ATOMS, R2 IS A MEMBER OF THE GROUP CONSISTING OF ARYL RADICALS AND ALKYL RADICALS OF THE FORMULA -CNH2N- WHERE N IS A SMALL POSITIVE INTEGER AND R3 IS A MEMBER OF THE GROUP CONSISTING OF HYDROGEN ALKALI METAL, AMMONIUM AND CYCLOHEXYLAMINE IONS.
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) | 1960-08-05 | 1961-02-04 | 1961-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-05 | 1965-02-04 | 1965-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-05 | 1969-02-04 | 1969-08-06 | $7700.00 | Window Closed / Lapsed |