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For the Inventor, By the Inventor

Duisburg, Germany

Norbert L Piret

This inventor holds 4 USPTO granted patents. Top assignees: Duisburger Kupferhutte, Duisburger Dupferhutte. Active years: 1977-1981.

USPTO Granted Patents = 4

% Patents Active = 100.0

Average Co-Inventor Count = 2.8

ph-index = 4

Forward Citations = 41(Granted Patents)


Company Filing History:

goldMedal3 out of 6 
 
Duisburger Kupferhutte
 patents
silverMedal1 out of 1 
 
Duisburger Dupferhutte
 patent

Years Active: 1977-1981

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4 patents (USPTO):Explore Patents
1. 4260588 - Production of sulphidic copper concentrates (1981-04-07),
2. 4131454 - Process for recovering silver and gold from chloride solutions (1978-12-26),
3. 4127639 - Process for recovering silver from residues containing silver and lead (1978-11-28),
4. 4030990 - Process for recovering electrolytic copper of high purity by means of (1977-06-21),
Profile summary based on public USPTO records.
Please report any incorrect information to [email protected]
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