US PATENT SUBCLASS 34 / 287
.~.~ Including vacuum

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


34 /   HD   DRYING AND GAS OR VAPOR CONTACT WITH SOLIDS

282  DF  PROCESS {24}
284  DF  .~ Freeze-drying {3}
287.~.~ Including vacuum {2}
288  DF  .~.~.~> And spray freeze or immersion
289  DF  .~.~.~> And heating {6}

DEFINITION

Classification: 34/287

Including vacuum:

(under subclass 284) Process of applying subatmospheric pressure to the material being treated during the freeze-drying process.