US2980559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pickling of magnesium alloys
Assignee: Dow Chemical Co
•
Filing: 1958-02-06
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Granted: 1961-04-18
•
Expires: 1978-02-06
Abstract
No abstract record available.
Inventors
- 👤 Whitby Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:14
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
THE METHOD OF REMOVING CONTAMINANTS FROM THE SURFACE OF A MANGNESIUM ARTICLE WHICH COMPRISES SUBJECTING THE ARTICLE TO THE ACTION OF AN AQUEOUS SOLUTION CONSISTING BY WEIGHT OF BETWEEN 10 AND 40 PERCENT OF GLYCOLIC ACID AND FROM 1/3 TO 1/10 AS MUCH OF NO3, IN THE FORM OF A SOLUBLE NITRATE SELECTED FROM THE GROUP CONSISTING OF AMMONIUM AND ALKALI AND ALKALINE EARTH METAL NITRATES, AS THE WEIGHT OF GLYCOLIC ACID IN SAID SOLUTION.
Claim 2
Independent Claim
75 words
THE METHOD OF REMOVING CONTAMINANTS FROM THE SURFACE OF A MANGNESIUM ARTICLE WHICH COMPRISES SUBJECTING THE ARTICLE TO THE ACTION OF AN AQUEOUS SOLUTION CONSISTING BY WEIGHT OF BETWEEN 10 AND 40 PERCENT OF GLYCOLIC ACID AND FROM 1/3 TO 1/10 AS MUCH OF NO3, IN THE FORM OF A SOLUBLE NITRATE SELECTED FROM THE GROUP CONSISTING OF AMMONIUM AND ALKALI AND ALKALINE EARTH METAL NITRATES, AS THE WEIGHT OF GLYCOLIC ACID IN SAID SOLUTION.
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) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |