US PATENT SUBCLASS 424 / 116
.~ Having a known elemental analysis (e.g., antibiotic, etc.)

Current as of: June, 1999
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424 /   HD   DRUG, BIO-AFFECTING AND BODY TREATING COMPOSITIONS

115  DF  FERMENTATE OF UNKNOWN CHEMICAL STRUCTURE {2}
116.~ Having a known elemental analysis (e.g., antibiotic, etc.) {6}
117  DF  .~.~> Sulfur containing
118  DF  .~.~> 45-55% carbon
119  DF  .~.~> Over 55 to 58% carbon
120  DF  .~.~> Over 58 to 60% carbon
121  DF  .~.~> Over 60 to 62% carbon
122  DF  .~.~> Over 62% carbon

DEFINITION

Classification: 424/116

(under subclass 115) Composition wherein the empirical formula of the fermentate is disclosed as known.

(1) Note. Mixtures of antibiotics of unknown chemical structure obtained by the fermentation of a single micro-organism are classified in this and indented subclasses if the carbon percentage of at least one separable antibiotic is known; e.g., polymyxin wherein the carbon precentage of polymyxin B, is known.

(2) Note. The percentage of carbon is based on the relative quantity of carbon is the pure unreacted antibiotic. Derivatives; e.g., the antibiotic salts, etc., are classified with the pure unreacted antibiotic, even though the percent carbon of the derivative (e.g., salt) is different from the subclass definition.

(3) Note. In view of the problem of experimental error, the disclosed carbon percentage of a fermentate may only be an approximation. It is therefore advisable to search the adjacent subclass where a carbon percentage of the fermentate being sought is near the borderline between subclasses. Where a disclosed carbon percentage range extends from one subclass into another, the patent is placed as an original in the first appearing subclass and crossed to the subadjacent subclass.