US3031276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical milling of magnesium articles
Assignee: WYANDOTTE CEHMICALS CORP
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Filing: 1958-06-27
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Granted: 1962-04-24
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Expires: 1978-06-27
Abstract
No abstract record available.
Inventors
- 👤 Jacque L Duvall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:13
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23F1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS FOR THE CHEMICAL MILLING OF MAGNESIUM ARTICLES, WHICH COMPRISES IMMERSING THE SURFACE TO BE ETCHED IN AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF 1 TO 3 MOLS PER LITER OF SULFURIC ACID; AN ALKALI METAL SULFATE PRESENT IN AT LEAST A CRITICAL, MINIMUM MOL CONCENTRATION CORRESPONDING SUBSTANTIALLY OF THE VALUE OF X IN THE EMPIRICAL EQUATION
Claim 2
Dependent Claim
22 words
A PROCESS ACCORDING TO CLAIM 9 WHEREIN THE TEMPERATURE OF SAID SOLUTION IS IN A RANGE FROM ABOUT 70*F. TO ABOUT 120*F.
References Cited (Backward Citations)
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Cited
US1918545A
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US1954745A
Cited
GB500009A
Cited
US2176389A
Cited
US2326837A
Cited
US2413365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-23 | 1965-10-23 | 1966-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-23 | 1969-10-23 | 1970-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-23 | 1973-10-23 | 1974-04-24 | $7700.00 | Window Closed / Lapsed |