St. John v. Schulze

This is an appeal by St. John and Gray from concurring decisions, of the Patent Office tribunals, awarding priority of invention to ap-pellee Schulze.

The invention in issue is a process for producing useful mineral oil distillates, particularly lubricating oils, by distilling certain oil materials under very high vacuum, that is to say, at a very low absolute pressure and under nonoxidizing, conditions. The three counts in issue follow:

1. The process of producing useful mineral oil distillates which comprises-distilling, under an absolute pressure not exceeding 25 millimeters mercury, mineral…