Porex Technologies Corporation

Porex Corporation

M.a. Industries, Inc.

Michael W Smith

Daniel George Fullerton

Robert S Pierce

Howard A Mercer

Delores Sewell

Thomas Fleming

Described are flame retardant, porous plastic flame arrestors. The flame retardant, porous plastic flame arrestor is formed by irradiating a flame retardant polymer resin to achieve a fractional melt index, grinding the flame retardant polymer resin into a powder, and sintering the flame retardant polymer resin to form a porous structure. Irradiating the flame retardant polymer resin increases the resin's molecular weight and reduces the resin's melt index through crosslinking.

Flame retardant porous plastic resins

Porous products of thermoplastic polymers and the like are formed by sintering pellets, especially micropellets and/or pellets made by rapid water quenched pelletizing of the polymers, such as by underwater pelletizing or water ring pelletizing. The pellets are of a uniform size and shape, each having approximately equal dimensions along three mutually perpendicular axes, thereby producing porous products having smooth surfaces, narrow pore size distributions, greater strength and other improved characteristics. The porous products include antiperspirant and deodorant applicator heads, wastewater treatment bubblers and selective filters.

Sintered porous plastic material

Sintered porous plastic products and method of making same

A fluid transfer device has a resilient reservoir connected to a rigid hollow punch made of synthetic resin. The punch is precisely sized to enable manual penetration of rubber stoppers found on standard evacuated tubes which are commonly used for blood sampling. The diameter of the punch also allows for transfer of the fluid from the sample tube to the device in a reasonable amount of time. A method of transferring blood or blood products from the sample tube to testing apparatus involves using the device to penetrate a rubber cap on an evacuated tube and then transfer the blood to the device. The blood can then be transferred to a testing apparatus without exposure to the atmosphere.

Safety sampler

In a diagnostic apparatus system, a one piece porous substrate is provided in a container. The substrate serves both to extract an antigen in or on a top layer thereof with the remainder of the substrate serving as a reservoir. The pores in the top surface of the substrate are microscopic for entrapment of microspheres carrying antibodies. A target antigen in a test sample attaches to the antibodies when the test sample is poured through the top layer. The pores in all but the top layer of the substrate have a much greater pore size to comprise tile reservoir portion of the substrate.

Diagnostic system employing a unitary substrate to immobilize

In a pipette device, a suction device applies suction to a pipette tip to draw liquid into the pipette tip. A porous plastic plug is mounted in the pipette tip to prevent contamination of the suction device by the liquid sample. The median pore size in the porous plastic plug ranges from 3 microns to an upper limit which varies with the hydrophobicity of the material of the plug.

Pipette device constructed to prevent contamination by aerosols or

A tube liquid dispenser includes a resilient tube, a filter positioned in the tube at one end, a flange of sealing material extending radially around the outer circumference of the tube, and an opposite end closed except for a dispensing opening of a size through which liquid passes only upon the application of pressure to the liquid.

Tube liquid dispenser

In a diagnostic apparatus system, a one piece porous substrate is located in a container. The substrate serves both to extract an antigen in or on a top layer with the remainder of the substrate serving as a reservoir. The pores in the top surface of the substrate are microscopic for entrapment of microspheres carrying antibodies. A target antigen in a test sample attaches to the antibodies when the test sample is poured through the top layer. The pores in all but the top layer of the substrate have a much greater pore size to define the reservoir portion of the substrate. The invention also includes a method of casting a microporous matrix in surfaces of a plurality of macroporous slugs. The method includes the steps of selecting a casting apparatus that defines openings for receiving the slugs and wells that are adjacent to the openings, positioning the slugs in the openings with the surfaces facing upward, the surfaces being positioned adjacent to the wells, dispensing a casting solution into the wells so that the solution contacts the surfaces, and allowing at least a portion of the solution to wick into the slugs and harden so that the microporous matrix is cast in the surfaces. The invention also includes an apparatus for practicing the method.

Growing community of inventors

Fairburn, GA, United States of America

Michael W Smith