Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 5749726 | Disposable point of use filtration element for purifying air and water supplies to dental handpieces A point of use microfiltration device suitable for filtering the cooling water and cooling air supplies to a turbine driven dental handset is a multicompartmental device containing microporous filtration membranes effective to remove particulate matter, p... | 05/12/1998 |
| 5601711 | Selective separation filter device A filter device or apparatus is provided for the separation of materials, especially biomaterials from a fluid sample, under a force such as centrifugation, positive pressure, vacuum, or gravity. The device comprises two or more in-line tubular elements, ... | 02/11/1997 |
| 5554025 | Disposable point of use air and water filter for dental syringes A combination air and water microfiltration device suitable for mounting on a dental syringe handset contains microporous membrane air and water filters which prevent particulate and bacterial contamination of the air and water streams applied to a dental... | 09/10/1996 |
| 5531893 | Inter-penetrating network charge modified microporous membrane Hydrophilic inter-penetrating network charge modified microporous membranes are provided as well as a method of preparing the membranes by casting a membrane matrix blend containing matrix polymer, a solvent system, a wetting polymer compatible with the m... | 07/02/1996 |
| 5472606 | Self-supporting, pleated, spirally wound filter A coreless filter comprises a pleated, spirally wound loop of material disposed in a housing. The loop includes a layer of filter material, such as a membrane filter, interposed between two support layers.... | 12/05/1995 |
| 5403482 | Self-supporting, pleated, spirally wound filter and the corresponding process of making A coreless filter comprises a pleated, spirally wound loop of material disposed in a housing. The loop includes a layer of filter material, such as a membrane filter, interposed between two support layers.... | 04/04/1995 |
| 5308483 | Microporous filtration funnel assembly An in-line filter assembly is provided of a type having a housing divided into inlet and outlet chambers by a filter membrane having its periphery fluid-flow-sealed within the housing, the filter being readily disassemblable so that the filter membrane ca... | 05/03/1994 |
| 5278296 | Production of hydroxysteryl glycoside compounds Novel glycosides, especially steroidal glycosides, and a novel method of their production, are provided. For the novel method of producing novel glycosides, hydroxysteryl compounds are glycosylated with tri-O-acyl glucal using molecular iodine as a reacti... | 01/11/1994 |
| 5277812 | Inter-penetrating network charge modified microporous membrane Hydrophilic inter-penetrating network charge modified microporous membranes are provided as well as a method of preparing the membranes by casting a membrane matrix blend containing matrix polymer, a solvent system, a wetting polymer compatible with the m... | 01/11/1994 |
| 5269931 | Cationic charge modified microporous membranes Cationic charged semihydrophobic polyethersulfone (CSfIP) membranes having hydrophilic and semihydrophobic properties are provided, as well as preparation of the same by post-treatment. Typically, as an illustration, a microporous hydrophilic polyethersul... | 12/14/1993 |
| 5209849 | Hydrophilic microporous polyolefin membrane A hydrophilic microporous membrane, is provided comprising a hydrophobic membrane substrate exemplified by a polyolefin or partially fluorinated polyolefin membrane. A process is also provided for preparing a hydrophilic membrane by grafting a water solub... | 05/11/1993 |
| 5200073 | Polymeric film filter assembly A flexible inflatable polymer film filter assembly or device is provided in pouch or sleeve form for filtration of fluid comprising at least one fluid porous dead-end filter panel located internally within the pouch or sleeve with the opposite end edges o... | 04/06/1993 |
| 5178765 | Hydrophilic membranes prepared from polyethersulfone/poly-2-oxazoline/polyvinylpyrrolidone blend Porous blended hydrophilic copolymer (polyethersulfone resin, poly-2-oxazoline resin, and polyvinylpyrrolidone resin) microporous membranes are provided which are useful for filtering macromolecules or particles from fluids. The invention also concerns a ... | 01/12/1993 |
| 5160626 | Blotting methods using polyaldehyde activated membranes This invention relates to methods for gel electrophoresis, for sample transfer, for identifying a macromolecule, for blotting including dot blotting, and for colony hybridization, involving polyaldehyde activated microporous membranes.... | 11/03/1992 |
| 5156780 | process for treating a porous substrate to achieve improved water and oil repellency Oil and water repellency is conferred upon porous substrates (10) by treatment with a solution of a monomer (16) of the formula: (Cn E2n+1)(CH2)x (CHR)OCOCH.dbd.CH2 where n is an integer; X is 0,1,2 o... | 10/20/1992 |
| 4900449 | Filtration membranes and method of making the same Microporous membranes can be prepared which comprise a polymer which is a hydrophobic polymer in bulk form and which has an equilibrium water absorption from about 2% to about 4%, but is hydrophilic when precipitated as a membrane. The membranes are furth... | 02/13/1990 |
| 4468321 | Filter device with magnetic filter clamp The filter device is for filtering liquids and has a reservoir member for receiving the liquid to be filtered and a spout member for exit of the liquid after it is filtered, the spout member being assembled to the reservoir member with a filter disc there... | 08/28/1984 |
| 4466931 | Method for manufacturing microporous membrane The starting materials for the practice of the present invention are (1) one or more organic monomers or oligomers which upon irradiation very rapidly undergo a polymerization reaction to form a solid polymer; and (2) a liquid vehicle in which the one or ... | 08/21/1984 |
| 4459139 | Disposable filter device and liquid aspirating system incorporating same The disposable filter device of the invention has a housing with a fluid inlet chamber and fluid outlet chamber separated by a hydrophobic filter and having a hydrophilic filter on the inlet chamber side of the hydrophobic filter. In the liquid aspirating... | 07/10/1984 |
| 4444661 | Filter device A disposable filter device having a plastic housing with inlet and outlet chambers separated by a filter disc sealed within the housing, the housing being readily disassemblable after use to remove the filter disc for identification or analysis of the mat... | 04/24/1984 |
| 4374232 | Graft copolymer membrane and processes of manufacturing and using the same A cast film, sheet or coating of a crosslinked graft copolymer of an organic polymeric substrate and an ethylenically unsaturated organic monomer is formed by effecting the graft copolymerization while the polymeric substrate and monomer are in solution i... | 02/15/1983 |
| 4369112 | Filter device The filter device has a housing with elongated top and bottom walls and side walls which taper inwardly from top to bottom. The top wall has extending downwardly therefrom into the housing a generally flat filter membrane support with a quadrangular perip... | 01/18/1983 |
| 4362047 | Filter device for cigarette testing The disposable filter device of the invention is particularly suited for testing for the amounts of tars and nicotine in cigarettes and comprises a housing having two components (2,4) one of which has a cylindrical portion (8) and the other of which has a... | 12/07/1982 |
