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US2989485A
Expired / Lapsed
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Inhibition of metal corrosion
Assignee: Dow Chemical Co
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Filing: 1958-05-21
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Granted: 1961-06-20
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Expires: 1978-05-21
Abstract
No abstract record available.
Inventors
- 👤 Louis H Eilers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:14
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A CORROSION-INHIBITED AQUEOUS NITRIC ACID SOLUTION COMPRISING NITRIC ACID AND, AS A CORROSION INHIBITOR THEREFOR, ABOUT 0.125 TO 1.0 PERCENT BY VOLUME OF A SULFUR-CONTAINING COMPOUND SELECTED FROM THE GROUP CONSISTING OF LOWER ALKANEDITHIOLS, FURFURYLTHIOL, LOWER MERCAPTOALKANOLS, LOWER DIMERCAPTOALKANOLS, AND LOWER THIOLALKANOIC ACID.
Claim 2
Dependent Claim
43 words
A CORROSION-INHIBITED AQUEOUS NITRIC ACID SOLUTION COMPRISING NITRIC ACID AND, AS A CORROSION INHIBITOR THEREFOR, ABOUT 0.125 TO 1.0 PERCENT BY VOLUME OF A SULFUR-CONTAINING COMPOUND SELECTED FROM THE GROUP CONSISTING OF LOWER ALKANEDITHIOLS, FURFURYLTHIOL, LOWER MERCAPTOALKANOLS, LOWER DIMERCAPTOALKANOLS, AND LOWER THIOLALKANOIC ACID.
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) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |