1
Lonnie G Hazlitt, Daniel G Moldovan: High temperature continuous viscometry coupled with analytic temperature rising elution fractionation for evaluating crystalline and semi-crystalline polymers. The Dow Chemical Company, Timothy S Stevens, Nis H Juhl, January 17, 1989: US04798081 (212 worldwide citation)

A method and apparatus for analyzing a solution of a crystalline or a semi-crystalline polymer sample to determine a crystallinity versus weight percent profile concurrently with viscosity average molecular weight. The polymer sample is first precipitated from solution over a cooling temperature gra ...


2
Harry D Ruhl Jr, Kenneth R Beebe: Method for sorting used plastic containers and the like. The Dow Chemical Company, Timothy S Stevens, July 28, 1992: US05134291 (53 worldwide citation)

A method for sorting a plurality of diverse objects into groups, each such object being made predominately from at least polyethylene terephthalate and polystyrene and at least two of polyvinyl chloride, polyethylene and polypropylene, the groups consisting at least of objects of like type of polyme ...


3
Purnendu K Dasgupta: Apparatus and method for automated microbatch reaction. The Dow Chemical Company, Timothy S Stevens, Burke M Halldorson, April 24, 1990: US04920056 (52 worldwide citation)

Apparatus and method for automatic microbatch reaction including a reactor having a reaction chamber, such as a 1.5 milliliter plastic centrifuge tube having a conical bottom. An automatically actuated injection valve is used to inject less than 1 milliliter of a sample into the reaction chamber. On ...


4
Curtis L Volkmann, John J Kester, Gregory A Stevens: Method for adhesive bonding with pretreatment of components. The Dow Chemical Company, Timothy S Stevens, Wendy B Buskop, Burke M Halldorson, June 5, 1990: US04931125 (46 worldwide citation)

A method for adhesively bonding a first body to a second body, the first body comprising a non-metallic substrate, such as a piece of rubber, or comprising a non-metallic substrate and a filler therein, such as a piece of fiberglass reinforced plastic, the second body comprising any type of substrat ...


5
Joseph P Weller, David P Denton, Sandra V Lange, Chester R Norman, Mary A Leugers, Stuart Farquharson, Jean P Chauvel Jr: Photometric cell and probe having windows fusion sealed to a metallic body. The Dow Chemical Company, Timothy S Stevens, September 10, 1991: US05046854 (43 worldwide citation)

A photometric probe or a photometric cell having separate windows and a metallic probe body or cell body. The window(s) are sealed to the probe or cell body by brazed or frit seals which are less likely to leak after extended use in high temperature and/or high pressure industrial applications than ...


6
Sandra V Lange, David P Denton, Joseph P Weller, Jean P Chauvel Jr, Stuart Farquharson, Harry D Ruhl Jr, Gregory A Winter: Process control method for manufacturing polyolefin. The Dow Chemical Company, Timothy S Stevens, September 29, 1992: US05151474 (42 worldwide citation)

A process control method for controlling a polyolefin polymerization process, such as a solution polyethylene process, which includes five steps. The first step is to flow a stream of a solvent into a polyolefin reactor, such as flowing a stream of heptane solvent into the reactor at essentially a c ...


7
Mani Shabrang: Sealed electrochromic device. The Dow Chemical Company, Timothy S Stevens, August 4, 1992: US05136419 (41 worldwide citation)

An improved electrochromic device of the type employing: a working electrode, such as a thin essentially transparent layer of indium/tin oxide coated on glass; the working electrode being coated with an electrochromic layer, such as a thin essentially transparent layer of tungsten oxide; the electro ...


8
Gerhard A Meyer: Intra-microspray ICP torch. The Dow Chemical Company, Timothy S Stevens, Wood Herron & Evans, February 5, 1991: US04990740 (34 worldwide citation)

An intra-microspray ICP torch for use in conjunction with spectographic analysis generates a high temperature ionized gas in a plasma region at one end of the torch, and includes a preshaped tube mounted within the torch, with a first end of the tube terminating adjacent the plasma region, and a neb ...


9
Timothy S Stevens, Gary L Jewett, Robert A Bredeweg: Liquid chromatographic method and apparatus with a packed tube membrane device for post-column derivatization/suppression reactions. The Dow Chemical Company, Burke M Halldorson, Timothy S Stevens, June 14, 1988: US04751004 (34 worldwide citation)

Packing tube membranes or membrane channels for Ion Chromatography with inert or charged ion exchange beads greatly increases overall suppressor efficiency. The length of membrane required is reduced, e.g. from 20 feet to 5 feet and bandspreading is reduced from 870 .mu.l to 200 .mu.l. This signific ...


10
Jian Dong Shao: Double acting pump. The Dow Chemical Company, Timothy S Stevens, December 31, 1991: US05076769 (32 worldwide citation)

An improved double acting piston pump of the type having a shaft connected to the piston for reciprocating the piston wherein the shaft extends from the pump body. The improvement of the present invention is to reciprocate the shaft with an asymmetrical uniform motion rotary cam so that the pump del ...