Duval Corporation
Patent Owner
Stats
- 0 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Jan 06, 1987 most recent publication
Details
- 0 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 139 Total Citation Count
- Jan 09, 1980 Earliest Filing
- 13 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
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Recent Publications
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Recent Patents
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Expired/Abandoned/Withdrawn Patents
Patent #
Title
Status
Filing Date
Issue/Pub Date
Intl Class
4545972 Process for recovery of metal chloride and cuprous chloride complex saltsExpiredMay 19, 82Oct 08, 85[C01B]
4544460 Removal of potassium chloride as a complex salt in the hydrometallurgical production of copperExpiredJun 09, 81Oct 01, 85[C25C]
4488902 Horizontal, multistage electron beam refinement of metals with recycleExpiredJun 10, 83Dec 18, 84[C22B]
4342592 Non-polluting process for recovery of precious metal values from ores including those containing carbonate materialsExpiredAug 01, 80Aug 03, 82[C22B]
4272341 Process for recovery of metal values from lead-zinc ores, even those having a high carbonate contentExpiredJan 09, 80Jun 09, 81[C25C, C25B]
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