US2496596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formaldehyde corrosion inhibitor compositions
Assignee: Cities Service Oil Co
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Filing: 1949-06-11
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Granted: 1950-02-07
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Expires: 1969-06-11
Abstract
No abstract record available.
Inventors
- 👤 Melvin I Moyer
- 👤 Joseph M Hersh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:38
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/149; Y; Y10; Y10S; Y10S507/00; Y10S507/927; Y10S507/932; Y10S507/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
THE METHOD OF PROTECTING METAL EQUIPMENT WHICH IS SUBJECT TO THE CORROSIVE ACTION OF OIL WELL PRODUCTS CONTAINING HYDROGEN SULFIDE, WHICH COMPRISES TREATING SUCH METAL EQUIPMENT WHEN IN CONTACT WITH THE CORROSIVE METALS, WITH AN AQUEOUS SOLUTION CONTAINING A CORROSION INHIBITING AGENT INCLUDING FORMALDEHYDE AND AN AMINOREACTIVE COMPOUND, SELECTED FROM THE GROUP CONSISTING OF ALKYLAMINES, ALKANOL AMINES, ARYL AMINES, ALKYLAMINO PHENOLS, ALKYL AMINO PHENYLENE DIAMINES, HETROCYCLIC AMINES, AND UREAS, THE PROPORTION OF AMINO-REACTIVE COMPOUND TO FORMALDEHYDE BEING FROM ABOUT ONE TO THREE TO ABOUT ONE TO FORTY, THE QUANTITY OF SUCH AGENT BEING EFFECTIVE TO SUBSTANTIALLY INHIBIT THE CORROSION OF THE METAL OF THE EQUIPMENT.
Claim 2
Independent Claim
105 words
THE METHOD OF PROTECTING METAL EQUIPMENT WHICH IS SUBJECT TO THE CORROSIVE ACTION OF OIL WELL PRODUCTS CONTAINING HYDROGEN SULFIDE, WHICH COMPRISES TREATING SUCH METAL EQUIPMENT WHEN IN CONTACT WITH THE CORROSIVE METALS, WITH AN AQUEOUS SOLUTION CONTAINING A CORROSION INHIBITING AGENT INCLUDING FORMALDEHYDE AND AN AMINOREACTIVE COMPOUND, SELECTED FROM THE GROUP CONSISTING OF ALKYLAMINES, ALKANOL AMINES, ARYL AMINES, ALKYLAMINO PHENOLS, ALKYL AMINO PHENYLENE DIAMINES, HETROCYCLIC AMINES, AND UREAS, THE PROPORTION OF AMINO-REACTIVE COMPOUND TO FORMALDEHYDE BEING FROM ABOUT ONE TO THREE TO ABOUT ONE TO FORTY, THE QUANTITY OF SUCH AGENT BEING EFFECTIVE TO SUBSTANTIALLY INHIBIT THE CORROSION OF THE METAL OF THE EQUIPMENT.
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) | 1953-02-06 | 1953-08-08 | 1954-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-06 | 1957-08-08 | 1958-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-06 | 1961-08-08 | 1962-02-07 | $7700.00 | Window Closed / Lapsed |