Dhp Corporation

Other

Premier Dental Products Company

James J Longo, Jr

William A McHale

The invention relates to a high-temperature stable, one-part, aqueous tooth bleaching composition for contacting a tooth surface. The composition comprises a bleaching agent comprising a high level of a aqueous hydrogen peroxide. The bleaching agent is derived from multiple components within the composition and comprises at least about 15% by weight of the total composition weight. The Composition also comprises a bleaching agent stabilizer comprising from about 0.01% to about 1.00% by weight of the total composition weight.

Stable one-part aqueous tooth whitening composition

A crab trap is provided having an open configuration prior to trapping a crab and into which a crab can crawl to retrieve bait placed therein, the trap also having a closed configuration for trapping a crab therein. The trap has a generally rectangular frame assembly comprising a base frame having two hollow bottom side connecting tubes and two hollow bottom end connecting tubes connected at their corners by corner elbow connectors. A plurality of hollow vertical corner posts is inserted in the corner elbow connectors and is three dimensionally perpendicular to the rectangular frame. The vertical corner posts each have a longitudinal opening extending from the lower end of the vertical corner post to the approximate center point of the vertical corner post along the length of the vertical corner post. The bottom side connecting tubes, bottom end connecting tubes and vertical corner posts all contain a plurality of openings to permit water to flow through. A mesh covering covers the frame on the top, sides and ends and is attached to the frame at strategic locations by suitable retainers. The bottom mesh rests on the base frame. A plurality of draw cords, one end of each draw cord being tied to one side or corner of the bottom mesh is threaded through the openings in the vertical corner posts and exits at the upper ends of the vertical corner posts, the plurality of draw cords being joined together at a common point above the frame into a single draw cord which extends to the water surface.

Crab trap

Carboxylate and zinc oxyphosphate types of dental cement are removed from dental products by applying a solution containing an organic acid having a COOH radical to the dental product. A preferred organic acid is citric acid.

Method of removing dental cement from surfaces

Carboxylate cement is removed from dental products by use of a solution containing an organic acid having a COOH radical. A preferred organic acid is citric acid.

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Wilmington, DE, United States of America

James J Longo, Jr