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| Number | Title | Issue Date |
| 5398542 | Method for determining direction of travel of a wave front and apparatus therefor Direction of travel from a wave front in a pipeline is determined with two pressure sensors spaced relatively near to each other so that the site from which the wave front emanated is not located therebetween. For each sensor, a determination is made as t... | 03/21/1995 |
| 5316821 | Partition plate for multiple-stage adsorption separator A partition plate for multiple-stage adsorption separator includes a planar body member having opposing external surfaces and a peripheral edge with conduits providing fluid communication between the opposing surfaces and different points on the periphera... | 05/31/1994 |
| 5200075 | Separator An adsorbent is charged into a horizontal type packed column having a multiplicity of packed vessels each of which is composed of a partition plate and a cylindrical body and which are connected through the partition plates, from an opening formed on the ... | 04/06/1993 |
| 5193581 | Selector valve A selector valve used for distributing and combining process flow. This valve comprises an open-ended cylindrical casing, a valve seat secured to the casing, an inlet hole extending coaxially with the casing through the valve seat, a plurality of outlet h... | 03/16/1993 |
| 5055612 | Process for the preparation of naphthalene carboxylic acids A process for the preparation of naphthalene mono or polycarboxylic acids, such as 2,6-naphthalene dicarboxylic acid, is disclosed which includes oxidizing a naphthalene compound such as 2,6-diisopropylnaphthalene in a specific solvent with molecular oxyg... | 10/08/1991 |
| 4992622 | Method of separating 2,6-diisopropylnaphthalene from a mixture containing diisopropylnaphthalene isomers A method of separating 2,6-diisopropylnaphthalene from a mixture containing 2,6-diisopropylnaphthalene and structural isomers thereof including the 2,7-isomer is disclosed, wherein the mixture is first subjected to a selective adsorption and desorption tr... | 02/12/1991 |
| 4956526 | Digitizer having flat tablet with magnetic shield plate A digitizer for determining coordinate value of a point designated on a given two-dimensional coordinate plane. A pointing instrument is manually operable to designate a point on the given two-dimensional coordinate plane of a tablet. The tablet includes ... | 09/11/1990 |
| 4950824 | Process for the production of 2,6-diisopropylnaphthalene A process for the production of 2,6-diisopropylnaphthalene is disclosed wherein an isopropylation reaction mixture containing isopropylated naphthalenes is subjected to transalkylation with a triisopropylnaphthalene-containing mixture to obtain a mixture ... | 08/21/1990 |
