PATENTS

2960. ----- [RUHRCHEMIE, A. G.]  [Lubricating Oils.]  French  Patent 791,950.  Dec. 19, 1935.  Chem. Abs., vol. 30, 1936, p. 4315.

Lubricating oils are improved by mixing them with the polymerization products obtained by treating gases containing C₂H₄ and C₃H₆ with agents such as AlCl₃, FeCl₂, ZnCl₂, BF and, if necessary, accelerators or retarders.

See also British Patent 464,393 (abs. 2939).