US2514508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion prevention
Assignee: Standard Oil Development Co
•
Filing: 1947-04-05
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Granted: 1950-07-11
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Expires: 1967-04-05
Abstract
No abstract record available.
Inventors
- 👤 Jr Leslie G Nunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:52
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
57 words
A METHOD FOR INHIBITING CORROSION OF FERROUS METAL IN CONTACT WITH AN AQUEOUS FLUID CONTAINING HYDROGEN SULPHIDE WHICH COMPRISES INCORPORATING IN THE AQUEOUS FLUID A UREA FORMALDEHYDE CONDENSATION PRODUCT WHICH IS AT LEAST CAPABLE OF BEING COLLOIDALLY SUSPENDED IN SAID AQUEOUS FLUID, SAID CONDENSATION PRODUCT BEING USED IN A SMALL BUT SUFFICIENT QUANTITY TO INHIBIT SAID CORROSION.
Claim 2
Independent Claim
57 words
A METHOD FOR INHIBITING CORROSION OF FERROUS METAL IN CONTACT WITH AN AQUEOUS FLUID CONTAINING HYDROGEN SULPHIDE WHICH COMPRISES INCORPORATING IN THE AQUEOUS FLUID A UREA FORMALDEHYDE CONDENSATION PRODUCT WHICH IS AT LEAST CAPABLE OF BEING COLLOIDALLY SUSPENDED IN SAID AQUEOUS FLUID, SAID CONDENSATION PRODUCT BEING USED IN A SMALL BUT SUFFICIENT QUANTITY TO INHIBIT SAID CORROSION.
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) | 1953-07-10 | 1954-01-09 | 1954-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-10 | 1958-01-09 | 1958-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-10 | 1962-01-09 | 1962-07-11 | $7700.00 | Window Closed / Lapsed |