Vacuum toilet unit
Patent 5909968 Issued on June 8, 1999. Estimated Expiration Date: 
July 7, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 7, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3591868 Vacuum flush water closet Sanitary fixtures Patent #: 5231706 InventorsAssigneeApplicationNo. 889620 filed on 07/07/1997US Classes:4/431, Pump or suction-type discharge4/252.2, Support for a wall hung closet bowl4/420BowlExaminersPrimary: Phillips, Charles E.Attorney, Agent or FirmForeign Patent References
International ClassE03D 011/00Foreign Application Priority Data1996-07-09 FIAbstractA vacuum toilet unit comprises a toilet bowl, an operating mechanism for the toilet function, and an outer shell enclosing both the toilet bowl and the operating mechanism. In normal use of the toilet unit, substantially all of the externally applied load exerted by a user of the toilet is carried by the shell. In order to allow service access to the bowl and operating mechanism, at least a substantial portion of the shell is removable without any substantial influence on the support of the bowl or operating mechanism. | |
