Provincial Holdings Ltd.
Patent Owner
Stats
- 0 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Oct 28, 1986 most recent publication
Details
- 0 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 59 Total Citation Count
- Sep 22, 1980 Earliest Filing
- 4 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
- No Technology to Display
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Recent Publications
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Recent Patents
- No Recent Patents to Display
Expired/Abandoned/Withdrawn Patents
Patent #
Title
Status
Filing Date
Issue/Pub Date
Intl Class
4619814 Process for the recovery of non-ferrous metals from sulphide ores and concentratesExpiredSep 07, 83Oct 28, 86[C01G]
4415540 Recovery of non-ferrous metals by thermal treatment of solutions containing non-ferrous and iron sulphatesExpiredFeb 08, 82Nov 15, 83[C01G]
4372782 Recovery of lead and silver from minerals and process residuesExpiredMay 20, 81Feb 08, 83[C22B, C01G]
4317803 Recovery of non-ferrous metals by thermal treatments of solutions containing non-ferrous and iron sulphatesExpiredSep 22, 80Mar 02, 82[C01G]
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