US PATENT SUBCLASS 34 / 298
.~.~ With gas or vapor treating

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}
298.~.~ With gas or vapor treating {2}
299  DF  .~.~.~> Desiccant or molecular sieve {1}
301  DF  .~.~.~> With additional material cooling by separate refrigeration means

DEFINITION

Classification: 34/298

With gas or vapor treating:

(under subclass 284) Process combined with adding any character of material to or removing any character of material from the gas or vapor derived from the freeze-drying process.

(1) Note. This process could involve filtering, condensing,

moisturizing, etc. of the derived gas or vapor.