Patent US2617771A successfully refreshed from Google Patents.
US2617771A
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Corrosion retarder
Assignee: Occidental Chemical Corp
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Filing: 1948-07-30
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Granted: 1952-11-11
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Expires: 1968-07-30
Abstract
No abstract record available.
Inventors
- 👤 John T Rucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:32
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/04; C23G1/06; C23G1/065; C23F; C23F11/00; C23F11/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
44 words
THE METHOD OF PROTECTING METALS AGAINST CORROSION BY DILUTE AQUEOUS ACIDS WHICH COMPRISES INCORPORATING IN THE ACID 0.005 TO 5.0 PER CENT BY WEIGHT OF A QUATERNARY AMMONIUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF LAURYL PYRIDINIUM THIOCYANATE AND LAURYL DIMETHYL BENZYL AMMONIUM THIOCYANATE.
References Cited (Backward Citations)
US2340996A
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US2006216A
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US2203649A
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US2254940A
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US2321517A
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US2402526A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |