US2929752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prevention of discoloration of magnesium in high temperature wrought operation
Assignee: Dow Chemical Co
•
Filing: 1957-08-16
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Granted: 1960-03-22
•
Expires: 1977-08-16
Abstract
No abstract record available.
Inventors
- 👤 Lyle G Treat
- 👤 Donald J Levy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:00
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A PROCESS FOR PREVENTING THE DISCOLORATION OF MAGNESIUM IN HIGH TEMPERATURE WROUGHT OPERATION, WHICH COMPRISES CONTACTING THE PROCESSED UNDISCOLORED MAGNESIUM AFTER THE WROUGHT OPERATION WITH A FLUORINE-CON TAINING ATMOSPHERE HAVING FROM 0.1 TO 10,000 PARTS PER MILLION BY VOLUME OF A FLUORINE-CONTAINING COMPOUND FOR A LENGTH OF TIME IN THE RANGE OF 0.1 TO 60 SECONDS.
Claim 2
Dependent Claim
56 words
A PROCESS FOR PREVENTING THE DISCOLORATION OF MAGNESIUM IN HIGH TEMPERATURE WROUGHT OPERATION, WHICH COMPRISES CONTACTING THE PROCESSED UNDISCOLORED MAGNESIUM AFTER THE WROUGHT OPERATION WITH A FLUORINE-CON TAINING ATMOSPHERE HAVING FROM 0.1 TO 10,000 PARTS PER MILLION BY VOLUME OF A FLUORINE-CONTAINING COMPOUND FOR A LENGTH OF TIME IN THE RANGE OF 0.1 TO 60 SECONDS.
References Cited (Backward Citations)
US2023366A
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US1972317A
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US2023498A
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US2187594A
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US2380202A
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GB655072A
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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) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |