(under subclass 11) Devices which include means for preventing the flow of heat to or from the device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
25+, and 27, for devices under subclass 11 where the device is provided with a spaced double wall envelope, or where the device is provided with an envelope and a casing or jacket for the envelope, see subclasses 25+ where the space between the double walls or between the envelope and the casing or jacket is sealed and either evacuated or filled with a gas or vapor (e.g., for heat insulation), and see subclass 27 where the space between the double walls or between the envelope and casing contains other heat insulating means.
SEE OR SEARCH CLASS
220, Receptacles, appropriate subclasses for miscellaneous receptacles provided with heat insulating means, see especially
2.1+, for envelopes and casings designed for use with lamps and discharge devices, and subclasses 400+ and 415+ for miscellaneous receptacles provided with linings. 252, Compositions,
62, for miscellaneous heat insulating compositions.
