US2952509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibition
Assignee: Dow Chemical Co
•
Filing: 1958-02-03
•
Granted: 1960-09-13
•
Expires: 1978-02-03
Abstract
No abstract record available.
Inventors
- 👤 Roger F Monroe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:48
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/04; Y; Y10; Y10S; Y10S507/00; Y10S507/933; Y10S507/934
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
55 words
A METHOD FOR THE PREVENTION OF CORROSION OF FERROUS AND NICKEL CONTAINING METALLIC SURFACES BY NONOXIDIZING ACIDS AT TEMPERATURES BELOW ABOUT 200*F. WHICH COMPRISES THE STEPS OF INTRODUCING INTO AN AQUEOUS SOLUTION OF A NON-OXIDIZING ACID FROM 0.1 TO 1.0 PERCENT BY WEIGHT OF 2-(2-PROPYNYLOXY) TETRAHYDROPYRAN AND SUBSEQUENTLY CONTACTING SAID SO-INHIBITED ACID WITH METALLIC SURFACES.
References Cited (Backward Citations)
US1877504A
Cited
US2171011A
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US2582129A
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US2564758A
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US2877188A
Cited
US2802878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |