US2607744A
Expired / Lapsed
US
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Corrosion inhibition
Assignee: Standard Oil Development Co
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Filing: 1949-07-18
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Granted: 1952-08-19
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Expires: 1969-07-18
Abstract
No abstract record available.
Inventors
- 👤 Prentiss S Viles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:38
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/141; C23F11/143; Y; Y10; Y10S; Y10S507/00; Y10S507/927; Y10S507/932; Y10S507/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A METHOD FOR INHIBITING THE CORROSIVITY OF AQUEOUS SOLUTIONS CONTAINING CORROSIVE AMOUNTS OF A CORROSIVE MATERIAL SELECTED FROM THE CLASS CONSISTING OF OXYGEN, HYDROGEN SULFIDE, CARBON DIOXIDE, AND THEIR MIXTURES IN CONTACT WITH A FERROUS METAL SURFACE WHICH COMPRISES ADDING TO SAID CORROSIVE SOLUTION A SMALL BUT EFFECTIVE AMOUNT OF THE REACTION PRODUCT RESULTING WHEN AN ONLY PARTIALLY SATURATED AQUEOUS SOLUTION TO AN ACIDIC CHROMIUM SALT HAVING A PH LESS THAN 7 HAS ADDED THERETO AN AMINE SELECTED FROM THE GROUP CONSISTING OF PRIMARY, SECONDARY, TERTIARY AND MIXED AMINES AT A TEMPERATURE WITHIN THE RANGE OF 60* TO 100* F., THE AMINE AND THE SOLUTION OF ACIDIC CHROMIUM SALT BEING EMPLOYED IN AMOUNTS SUFFICIENT TO PROVIDE EQUIMOLAR AMOUNTS OF AMINE AND ACIDIC CHROMIUM SALT TO FORM A HOMOGENEOUS SOLUTION OF SAID REACTION PRODUCT.
Claim 2
Independent Claim
133 words
A METHOD FOR INHIBITING THE CORROSIVITY OF AQUEOUS SOLUTIONS CONTAINING CORROSIVE AMOUNTS OF A CORROSIVE MATERIAL SELECTED FROM THE CLASS CONSISTING OF OXYGEN, HYDROGEN SULFIDE, CARBON DIOXIDE, AND THEIR MIXTURES IN CONTACT WITH A FERROUS METAL SURFACE WHICH COMPRISES ADDING TO SAID CORROSIVE SOLUTION A SMALL BUT EFFECTIVE AMOUNT OF THE REACTION PRODUCT RESULTING WHEN AN ONLY PARTIALLY SATURATED AQUEOUS SOLUTION TO AN ACIDIC CHROMIUM SALT HAVING A PH LESS THAN 7 HAS ADDED THERETO AN AMINE SELECTED FROM THE GROUP CONSISTING OF PRIMARY, SECONDARY, TERTIARY AND MIXED AMINES AT A TEMPERATURE WITHIN THE RANGE OF 60* TO 100* F., THE AMINE AND THE SOLUTION OF ACIDIC CHROMIUM SALT BEING EMPLOYED IN AMOUNTS SUFFICIENT TO PROVIDE EQUIMOLAR AMOUNTS OF AMINE AND ACIDIC CHROMIUM SALT TO FORM A HOMOGENEOUS SOLUTION OF SAID REACTION PRODUCT.
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) | 1955-08-19 | 1956-02-18 | 1956-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-19 | 1960-02-18 | 1960-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-19 | 1964-02-18 | 1964-08-19 | $7700.00 | Window Closed / Lapsed |