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Class 236/57 - Bourdon type


Subclass of Class 236 - Automatic temperature and humidity regulation
Definition: Automatic steam-traps in which the drain-valve is directly
No. of patents: 2
Last issue date: 04/25/1989


NumberTitleIssue Date
4825047Temperature-responsive controller for waterbed mattress heaters
A controller for an electric resistance waterbed mattress heater supplied with electric current by an elongate power cord extending between the heater and a power service outlet. The controller includes a small diameter elongate cylindrical housing in whi... 		04/25/1989
4289815Cold water-insoluble polyvinyl alcohol pouch for the controlled release of active ingredients
A pouch for the controlled release of active ingredients into an aqueous medium comprising liquid or solid active ingredients enclosed in a sealed envelope of cold water-insoluble polyvinyl alcohol.... 		09/15/1981
 
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