US3134702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical milling of magnesium metal and magnesium alloys
Assignee: Dow Chemical Co
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Filing: 1960-08-17
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Granted: 1964-05-26
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Expires: 1980-08-17
Abstract
No abstract record available.
Inventors
- 👤 Long Herbert K De
- 👤 Donald E Ritzema
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:08
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/02; C23F1/04; C23F1/10; C23F1/14; C23F1/16; C23F1/22
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
94 words
AN AQUEOUS ACIDIC TREATING BATH FOR CHEMICALLY DIMENSIONING MAGNESIUM ARTICLES COMPRISING BY VOLUME BETWEEN 5 AND 85 PARTS OF PHOSPHORIC ACID, HAVING A CONCENTRATION OF AT LEAST 85 PERCENT H3PO4; BETWEEN 5 AND 25 PARTS OF AN ALIPHATIC POLYHYDRIC ALCOHOL (THE TOTAL OF THE ACID AND ALCOHOL NOT EXCEEDING 100 PARTS); BALANCE WATER, AS NEEDED, TO MAKE 100 PARTS BY VOLUME; AND BETWEEN 1 AND 45 PERCENT BY WEIGHT OF THE COMPOSITION SO MADE OF A NITRATE SALT SELECTED FROM THE CLASS CONSISTING OF THE NITRATES OF AMMONIUM AND ALKALI AND ALKALINE EARTH METALS.
Claim 2
Dependent Claim
94 words
AN AQUEOUS ACIDIC TREATING BATH FOR CHEMICALLY DIMENSIONING MAGNESIUM ARTICLES COMPRISING BY VOLUME BETWEEN 5 AND 85 PARTS OF PHOSPHORIC ACID, HAVING A CONCENTRATION OF AT LEAST 85 PERCENT H3PO4; BETWEEN 5 AND 25 PARTS OF AN ALIPHATIC POLYHYDRIC ALCOHOL (THE TOTAL OF THE ACID AND ALCOHOL NOT EXCEEDING 100 PARTS); BALANCE WATER, AS NEEDED, TO MAKE 100 PARTS BY VOLUME; AND BETWEEN 1 AND 45 PERCENT BY WEIGHT OF THE COMPOSITION SO MADE OF A NITRATE SALT SELECTED FROM THE CLASS CONSISTING OF THE NITRATES OF AMMONIUM AND ALKALI AND ALKALINE EARTH METALS.
Claim 3
Dependent Claim
98 words
THE METHOD OF SELECTIVELY CHEMICALLY DIMENSIONING A MAGNESIUM ARTICLE CONSISTING OF MASKING OFF THE PORTIONS OF SAID ARTICLE WHICH ARE TO REMAIN UNREDUCED IN SIZE WITH A COATING MATERIAL WHICH IS IMPREVIOUS TO AQUEOUS ACIDIC SOLUTIONS AND IMMERSING THE THUS PARTIALLY COATED ARTICLE IN THE BATH OF CLAIM 1 AT BETWEEN 60* AND 180*F. WHILE MAINTAINING A RELATIVE MOTION BETWEEN SAID BATH AND ARTICLE FOR AT LEAST A PORTION OF THE TIME OF IMMERSION UNTIL THE UNMASKED PORTIONS OF SAID ARTICLE ARE REDUCED TO THE DESIRED DIMENSIONS, REMOVING THE SO TREATED ARTICLE, AND RINSING THE ARTICLE WITH WATER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |