(under subclass 541) A container including a distinct double walled container for heat insulation of content effected by evacuation of any gases between said double walls.
(1) Note. Patents in this subclass as an original, include the recital of a vacuum type container as part of the claimed subject matter.
(2) Note. Because of the obvious similarity of disclosure in subclasses 543 and 544 no cross references have been made from one to the other. Thus, a full search for some features may require a search of both subclasses.
