The invention provides methods of producing and servicing insulating glass units. Methods are provided for reducing the pressure differential on an IG unit, for changing the interior pressure within an IG unit, and for changing the gaseous interior composition within an IG. These methods can be practiced...http://www.google.fr/patents/US6916392?utm_source=gb-gplus-shareBrevet US6916392 - Producing and servicing insulating glass units
