The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 24, 2015
Filed:
Dec. 22, 2009
Jozef A. W. M. Corver, Nuenen, NL;
Carlo J. J. M. DE Best, Raamsdonksveer, NL;
Francis W. Demarco, Niagra Falls, NY (US);
David Debo, Batavia, NY (US);
Jozef A. W. M. Corver, Nuenen, NL;
Carlo J. J. M. De Best, Raamsdonksveer, NL;
Francis W. DeMarco, Niagra Falls, NY (US);
David Debo, Batavia, NY (US);
IMA LIFE NORTH AMERICA INC., Tonawanta, NY (US);
Abstract
Parameters of a freeze drying process are monitored by measuring trace materials in the vacuum pump exhaust. The measurements are made using techniques such as acousto-optic spectrometry, multipass cavity-enhanced absorption spectrometry (CEAS) and cavity ring-down spectrometry (CRDS). The technique may be used to diagnose problems such as leakage in the freeze drying shelves, leakage in the condensation coils, leaks from atmosphere in the chambers and the presence of residual cleaning materials. The technique may also be used to monitor the presence of water vapor in the exhaust of a secondary drying process.