No mention a t all is made of the er perte Markush practice which many attorneys follow in setting up an artificial class of chemical equivalents. On the other side of the picture it must be regretfully stated that the chapter headed "Permissible Breadth of Chemical Claims" has been poorly handled. The chapter on "The Patent Application and Prosecution Thereof," although not recommended as a substitute for hiring a patent attorney, is strongly recommended t o any chemist having patent applications pending before the Patent Office. Some of the subjects treated exceptionally well, even though briefly, are: Invention and Discovery, Functional Claims (with a good section on chemical claims), Patentability of Uses, Reissues, and Infringement. Most previous books in this field which were designed particularly for chemists have erred either on the side of being nothing but a compendium of case citations or else they contained almost no citations. an explanation of each basic principle or rule, and then illustrations from leading law cases supporting the mle or contrary t o it, as the case may be.
Anyone already well versed in the field, however, while finding thelittle volume interesting, would also 6nd it too elementaty to have much value as a reference work. The material is handled very well for easy understanding by the beginner. The keynote of this book is that i t deals mainly with fundamentals and is frankly not intended as an exhaustive treatment of any one phase of the patent law.
The object of the course was t o acquaint chemists, engineers, and students who had no professional law training, with the basic principles and rules underlying the obtaining of patents and the litigation that often arises when patents are involved.
This book was the outgrowth of a number of weekly lectures in substantive patent law conducted by the author as an extension course a t the University of Delaware. Chester H.Bieslnjdd, Member of the New York Bar and of the Bar of the District of Columbia. Even without these things this is one of the best books in the field and every inorganic chemist should own and use it. The hook would be much more useful as a reference book if the number of references t o the original literature were greatly expanded and an author index included.
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