LYONNAISE DES EAUX-DUMEZ
Patent Owner
Stats
- 1 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- May 04, 1999 most recent publication
Details
- 1 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 196 Total Citation Count
- Oct 31, 1990 Earliest Filing
- 4 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
Intl Class
Technology
Matters
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Top Patents (by citation)
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Recent Publications
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Recent Patents
Patent #
Title
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Issue Date
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Expired/Abandoned/Withdrawn Patents
Patent #
Title
Status
Filing Date
Issue/Pub Date
Intl Class
5395528 Method of biologically purifying liquids contaminated with impuritiesExpiredDec 23, 92Mar 07, 95[C02F]
5066402 Method of changing operating modes in automatic water filtering apparatus using tubular membranesExpiredOct 31, 90Nov 19, 91[B01D]
5043071 Method of backwashing tubular filter membranes, and apparatus for implementing the methodExpiredDec 06, 90Aug 27, 91[B01D]
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