BackDate of JudgmentDecember 4, 1992Issuing AuthorityFederal Court of AppealLevel of the Issuing AuthorityAppellate InstanceType of ProcedureJudicial (Civil)Subject MatterPatents (Inventions)Plaintiff/AppellantLubrizol Corp.Defendant/RespondentImperial Oil Ltd.Keywords
Obviousness,
Remedies,
Claim construction,
Date of invention,
Anticipation (Novelty),
Oil and gas,
Industrial chemicals