OXYTECH, INC.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5154737 System for eliminating air leakage and high purity oxygen of a PSA oxygen concentratorExpiredApr 24, 91Oct 13, 92[B01D]
5137549 Two stage super-enriched oxygen concentratorExpiredMar 26, 91Aug 11, 92[B01D]
5002591 High efficiency PSA gas concentratorExpiredJan 12, 90Mar 26, 91[B01D]
4869733 Super-enriched oxygen generatorExpiredJun 24, 88Sep 26, 89[B01D]
4541989 Process and device for the generation of ozone via the anodic oxidation of waterExpiredJan 27, 83Sep 17, 85[C01B, B01J]

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