US PATENT SUBCLASS 435 / 237
.~.~ By serial passage of virus

Current as of: June, 1999
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435 /   HD   CHEMISTRY: MOLECULAR BIOLOGY AND MICROBIOLOGY

235.1  DF  VIRUS OR BACTERIOPHAGE, EXCEPT FOR VIRAL VECTOR OR BACTERIOPHAGE VECTOR; COMPOSITION THEREOF; PREPARATION OR PURIFICATION THEREOF; PRODUCTION OF VIRAL SUBUNITS; MEDIA FOR PROPAGATING {2}
236  DF  .~ Inactivation or attenuation; producing viral subunits {2}
237.~.~ By serial passage of virus

DEFINITION

Classification: 435/237

By serial passage of virus:

(under subclass 236) Subject matter which involves attenuation of a virus by serial passage by transferring a virus containing body fluid through a series of animals or transfer of supernatant culture fluid through a series of cultures.