Abstract: Automatic treatment of a drain system is provided by the controlled injection of a bio-active liquid at established intervals into the drain system. A container of the treatment liquid is provided with a pump coupled between the container and the drain. Fluid level sensing means is located in the container and fluid temperature sensing means is located in the drain system. When the temperature is within range and the fluid level is sensed, the pump is periodically operated to inject a quantity of fluid directly into the drain system without operator control.

Abstract: A disposable protector for toilet seats having a cover of paper or similar material with a center cut-out generally conforming to the opening in the seat. The cover has a retainer member which may be in the form of a flange or tab which engage the inner edge of the seat to temporarily secure the protector in place during use. The underside of the cover may also have a frictional material such as latex or a low-tack adhesive. The cover may be treated with a suitable anti-bacterial agnt and may be provided to the consumer in a dispenser or in individualized packages that may be conveniently carried by the user.

Abstract: An apparatus for automatically treating a drain system to prevent or at least minimize clogging problems particularly in grease traps of the type provided in restaurants and other food preparation establishments. The apparatus includes a valve for directing fresh water into the grease trap for pretreating the trap in preparation for the injection of bioactive liquid cultures by the pump. The liquid cultures liquify and digest contaminants in the grease trap which are flushed therefrom by fresh water. The apparatus is controlled by a system which cyclically operates the apparatus in accordance with a preferred operational sequence and at adjustably variable time periods.

Abstract: A process for automatically treating a drain system to prevent or at least minimize clogging problems particularly in grease traps of the type provided in restaurants and other food preparation establishments. The process employs an apparatus which includes a valve for directing fresh water into the grease trap for pretreating the trap in preparation for the injection of bioactive liquid cultures by the pump. The liquid cultures liquify and digest contaminants in the grease trap which are flushed therefrom by fresh water. The apparatus is controlled by a system which cyclically operates the apparatus in accordance with a preferred operational sequence and at adjustably variable time periods.

Abstract: Customized dentures are manufactured by first producing denture bases in one of a plurality of standard sizes each having sockets therein for receiving an array of artificial teeth. Next, an array of artificial teeth removably coupled together by means of a U-shaped appliance which maintains the occlusal aspects of the teeth is positioned in the sockets. Such denture bases which may be wax, uncured synthetic resin or a cured synthetic resin are then shipped and inventoried by a dentist. To fit a particular oral cavity, the dentist first makes an impression of the oral cavity and from that impression upper and lower models are casted. The dentist then selects a denture base having the artificial teeth positioned thereon in one of the standard sizes which most closely accommodates the models. The denture bases are then conformed to the surface contours of the models and the prosthetic teeth are secured in the sockets.

Abstract: A method of making custom dentures from an uncured resin module wherein the module, molded to standard dimensions and including sockets for artificial teeth, is cooled to a low temperature to impart rigidity and prevent curing. The module with teeth in place is later conformed to a heated cast representation of the patient's oral cavity and then itself heated to cure the module thereby providing a custom denture.

Abstract: The disclosure relates to a method for producing artificial dentures comprising the preparation of a plurality of substantially identical generally U-shaped hard base denture elements and fixing teeth thereto and using one of the hard base elements with teeth thereon to produce a temporary denture with a soft layer thereon and formably fitting the soft layer to a patient's mouth; then placing impression formable material in the soft layer and inserting it in the patient's mouth to impression form the impression formable material so as to attain a model upon which dental stone molds are cast; then placing another one of said substantially identical hard bases with teeth attached thereto in one of the dental stone molds and subsequently casting a hard impressionable plastic material against the opposite side of said denture element from said teeth and allowing the last mentioned material to cure and bond to the said substantially identical hard base element to thereby form a hard structural denture which confor

Abstract: A method for producing an artificial denture comprising the production of a denture module having an assembly of prosthetic teeth with a hard U-shaped base bonded thereto and with a soft deflectably formable layer attached and adapted to be digitally formed into the human mouth whereupon it may subsequently be impression formed with an impression material comprising hard or soft liner material thereon so as to provide the conformations of a final fitting denture, and whereupon the denture thus formed conforms intimately to the edentulous areas of the human mouth.

Abstract: A means and method for producing custom artificial dentures comprising a pair of trays adapted loosely to fit edentulus areas of a patient's mouth and stringers of generally U-shaped configuration having arrays of teeth afixed therein; the stringers being placed in the trays with the teeth projecting through the U-shaped openings therein, one tray for the maxillary and another tray for the mandibular area; a bite relator of deformable material engaged between the arrays of teeth held by said trays and impression forming material in the U-shaped recesses of the trays contiguous with the gums of a patient's mouth whereby impression castings may be made from which edentulus ridge fitting portions may be made and whereupon the respective stringers of teeth may then be bonded to the respective mandibulary and maxillary denture portions so formed.

Abstract: The disclosure relates to modular prosthetic dentures comprising maxillary and mandibular units, each unit being fittable to a variety of patients; each unit having teeth fixed to a hard base on which a deflectably formable layer is deflectably fittable to an edentulus ridge; one of said units having a flat plane acclusion geometry and said mandibular unit having a retro-molar pad fitting extension 1/2 inch or more in length; said extension comprising deflectably formable material; the deflectably formable material of both denture units being adapted to be united with a hard liner forming material when in an uncured state and when impression formed in a patient's mouth.