US3039909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of uniformly reducing the dimensions of magnesium shapes
Assignee: Dow Chemical Co
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Filing: 1956-07-09
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Granted: 1962-06-19
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Expires: 1976-07-09
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 10:55
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23F1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
THE METHOD OF UNIFORMLY REDUCING THE DIMENSIONS OF A METAL SHAPE COMPOSED OF AT LEAST 85 PERCENT BY WEIGHT OF MAGNESIUM WHICH CONSISTS OF SUBMERGING SAID SHAPE IN AN AQUEOUS BATH CONSISTING OF FROM ABOUT 0.70 TO 25.0 PERCENT OF NITRIC ACID, FROM ABOUT 3.0 PERCENT TO THE POINT OF SATURATED OF A NITRATE SELECTED FROM THE CLASS CONSISTING OF AMMONIUM NITRATE AND ALKALI METAL AND ALKALINE EARTH METAL NITRATES, AND MAINTAINING A RELATIVE MOTION BETWEEN SAID SHAPE AND SAID BATH DURING AT LEAST A PORTION OF THE DURATION OF THE SUBMERGENCE, AND THEREAFTER REMOVING SAID ARTICLE FROM THE BATH AND RINSING IT WITH WATER.
Claim 2
Independent Claim
105 words
THE METHOD OF UNIFORMLY REDUCING THE DIMENSIONS OF A METAL SHAPE COMPOSED OF AT LEAST 85 PERCENT BY WEIGHT OF MAGNESIUM WHICH CONSISTS OF SUBMERGING SAID SHAPE IN AN AQUEOUS BATH CONSISTING OF FROM ABOUT 0.70 TO 25.0 PERCENT OF NITRIC ACID, FROM ABOUT 3.0 PERCENT TO THE POINT OF SATURATED OF A NITRATE SELECTED FROM THE CLASS CONSISTING OF AMMONIUM NITRATE AND ALKALI METAL AND ALKALINE EARTH METAL NITRATES, AND MAINTAINING A RELATIVE MOTION BETWEEN SAID SHAPE AND SAID BATH DURING AT LEAST A PORTION OF THE DURATION OF THE SUBMERGENCE, AND THEREAFTER REMOVING SAID ARTICLE FROM THE BATH AND RINSING IT WITH WATER.
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) | 1965-06-18 | 1965-12-18 | 1966-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-18 | 1969-12-18 | 1970-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-18 | 1973-12-18 | 1974-06-19 | $7700.00 | Window Closed / Lapsed |