US2607739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning worked magnesium articles
Assignee: Dow Chemical Co
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Filing: 1950-04-29
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Granted: 1952-08-19
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Expires: 1970-04-29
Abstract
No abstract record available.
Inventors
- 👤 Long Herbert K De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:43
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A METHOD OF REMOVING SURFACE CONTAMINANTS FROM ARTICLES OF MAGNESIUM AND ITS ALLOYS WHICH COMPRISES SUBJECTING THE ARTICLE TO THE ACTION OF A SOLUTION CONSISTING OF ACETIC ACID AND A WATER SOLUBLE NITRATE SELECTED FROM THE GROUP CONSISTING OF THE ALKALI METAL NITRATES, ALKALI EARTH METAL NITRATES, AND AMMONIUM NITRATE DISSOLVED IN WATER, THE CONCENTRATION OF THE ACETIC ACID BEING 5 TO 45 PER CENT BY WEIGHT AND THE WATER-SOLUBLE NITRATE PRODUCING AN NO3 CONCENTRATION OF 1.5 TO 12 PER CENT, AT ROOM TEMPERATURE FOR A TIME SUFFICIENT TO REMOVE THE SURFACE CONTAMINANTS.
Claim 2
Independent Claim
93 words
A METHOD OF REMOVING SURFACE CONTAMINANTS FROM ARTICLES OF MAGNESIUM AND ITS ALLOYS WHICH COMPRISES SUBJECTING THE ARTICLE TO THE ACTION OF A SOLUTION CONSISTING OF ACETIC ACID AND A WATER SOLUBLE NITRATE SELECTED FROM THE GROUP CONSISTING OF THE ALKALI METAL NITRATES, ALKALI EARTH METAL NITRATES, AND AMMONIUM NITRATE DISSOLVED IN WATER, THE CONCENTRATION OF THE ACETIC ACID BEING 5 TO 45 PER CENT BY WEIGHT AND THE WATER-SOLUBLE NITRATE PRODUCING AN NO3 CONCENTRATION OF 1.5 TO 12 PER CENT, AT ROOM TEMPERATURE FOR A TIME SUFFICIENT TO REMOVE THE SURFACE CONTAMINANTS.
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 |