Individual holder
PETREK JOHN P
3 granted patents·123 citations·filing 1980–1990
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
3 records- 0183US4402793AMultiple effect thin film distillation system and processPETREK JOHN P·Filed 1981·Granted Sep 6, 1983·47 cites·20 claims
- 0272US5094721AMultiple-effect evaporation system and processPETREK JOHN P·Filed 1990·Granted Mar 10, 1992·44 cites·19 claims
- 0369US4329204AMultiple effect thin film distillation systemPETREK JOHN P·Filed 1980·Granted May 11, 1982·32 cites·19 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →