Patent US2935474A successfully refreshed from Google Patents.
US2935474A
Expired / Lapsed
US
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Process of inhibiting corrosion and corrosion inhibiting compositions
Assignee: Visco Products Co
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Filing: 1955-11-28
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Granted: 1960-05-03
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Expires: 1975-11-28
Abstract
No abstract record available.
Inventors
- 👤 Willard H Kirkpatrick
- 👤 Virgil L Seale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:08
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/145; Y; Y10; Y10S; Y10S507/00; Y10S507/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PROCESS FOR PREVENTING CORROSION OF FERROUS METALS IN CONTACT WITH PETROLEUM HYDROCARBONS CONTAINING CORROSIVE AGENTS SELECTED FROM THE GROUP CONSISTING OF CARBON DIOXIDE, HYDROGEN SULFIDE, BRINE, WEAK INORGANIC ACIDS AND ORGANIC ACIDS, WHICH COMPRISES APPLYING TO THE METAL A CORROSION INHIBITING AMOUNT OF A COMPOSITION COMPRISING A QUANTERNARY SALT OF AT LEAST ONE COMPOUND FROM THE GROUP CONSISTING OF COMPOUNDS HAVING THE GENERAL FORMULA.
Claim 2
Dependent Claim
65 words
A PROCESS FOR PREVENTING CORROSION OF FERROUS METALS IN CONTACT WITH PETROLEUM HYDROCARBONS CONTAINING CORROSIVE AGENTS SELECTED FROM THE GROUP CONSISTING OF CARBON DIOXIDE, HYDROGEN SULFIDE, BRINE, WEAK INORGANIC ACIDS AND ORGANIC ACIDS, WHICH COMPRISES APPLYING TO THE METAL A CORROSION INHIBITING AMOUNT OF A COMPOSITION COMPRISING A QUANTERNARY SALT OF AT LEAST ONE COMPOUND FROM THE GROUP CONSISTING OF COMPOUNDS HAVING THE GENERAL FORMULA.
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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) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |