U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Quotables

"Telephone, n. An invention of the devil which abrogates some of the advantages of making a disagreeable person keep his distance. "

Ambose Bierce

Newsletter  PatentStorm News

Make the Most of Our Site

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest innovations by subscribing to an RSS feed.

Registered users: Manage your profile.

 

Class 204/456 - Gel electrophoresis


Subclass of Class 204 - Chemistry: electrical and wave energy
Definition: Process in which particles or components migrate in an electric
No. of patents: 274
Last issue date: 02/28/2012


            7  
NumberTitleIssue Date
5466348Methods and devices for enhanced biochemical sensing
A method and application for detecting and measuring the presence of a binding target material employs a semiconductor device having a receptor-covered surface topgate, separated by a dielectric layer from a substrate. Receptors attached to this surface e...
11/14/1995
5464516Process for producing an electrophoresis separation layer
An electrophoresis separation layer is produced which comprises a polyacrylamide gel which remains stable even when stored for a long time and is available for analyzing substances of an extremely wide molecular weight range in electrophoresis for determi...
11/07/1995
5451303Cleaning hydrophilic contact lenses by electrochemical means
A composition and method for cleaning and disinfecting of contact lenses that employ an electrical field applied to a lens that causes contaminating deposits to migrate therefrom is described. The composition of the invention includes a pair of component ...
09/19/1995
5427663Microlithographic array for macromolecule and cell fractionation
A sorting apparatus and method for fractionating and simultaneously viewing individual microstructures, such as free cells, viruses, macromolecules, or minute particles in a fluid medium. The sorting apparatus is composed of a substrate having a receptacl...
06/27/1995
5308459Biosynthetic cerebrospinal fluid control and method of use
The present invention relates to a biosynthetic cerebrospinal fluid control and method of use. Additionally, this invention relates to the isolation and purification of stable liquid human prealbumin, a component in the biosynthetic cerebrospinal fluid co...
05/03/1994
5302510DNA sizing control standards for electrophoretic analyses
The present invention is directed to a method for assessing the reliability of DNA sizing measurements performed on DNA samples. DNA sizing control standards are disclosed wherein each standard contains a unique set of DNA restriction fragments composed o...
04/12/1994
5298135Production of electrophoretically-homogenous protein-colloidal gold complexes
A method is provided to determine the conditions required for the production of homogeneous protein-colloidal gold complexes. The method uses the electrophoretic migration of a discrete fraction of a sample of protein-colloidal gold complexes to identify,...
03/29/1994
5284558Electrophoresis-based sequencing of oligosaccharides
The electrophoretic isolation and monosaccharide sequence determination of a neutral or weakly acidic oligosaccharide species of interest are disclosed. A labeling compound and a charged group are coupled to the reducing end of the species of interest, th...
02/08/1994
5233030High molecular weight DNA compositions for use in electrophoresis of large nucleic acids
The invention provides high molecular weight DNA length standards useful for sizing very long DNA molecules and methods for producing such standards. In a preferred embodiment, the invention provides a mixture of T4 DNA concatemers that forms a DNA "ladde...
08/03/1993
5196099Electrophoretic matrix and electrophoresis using same
An electrophoretic matrix comprised of at least one water-insolubilized, temperature-responsive polymeric compound having an LCST is disclosed. The electro-phoretic matrix can change its hydrophilic/hydrophobic property by changing temperature. A method o...
03/23/1993
5190856Method and apparatus for detecting single base mutations in DNA with denaturing gradient electrophoresis
Single base pair differences between otherwise identical DNA fragments can result in an altering of the melting behavior which can be detected by denaturing gradient gelelectrophoresis (DGGE). A method has been developed for efficient transfer of genomic ...
03/02/1993
5164057Electrophoretic matrices and electrophoretic method using same
An electrophoretic matrix comprised of at least one water-insolubilized, temperature-responsive polymeric compound having an LCST is disclosed. The electrophoretic matrix can change its hydrophilic/hydrophobic property by changing temperature. A method of...
11/17/1992
5159049Method for stabilizing polyacrylamide gels
A method for preparing stabilized, rehydratable polyacrylamide gels, wherein the stabilizers employed include substituted monosaccharides where the hydroxyl group of the carbon 1 is substituted with a non-charged group comprising an ଱-methyl group o...
10/27/1992
5149416Polymeric electrophoresis media
Preformed, water-soluble, acrylamide based copolymers comprising a minor proportion of a comonomer, which comonomer contains a site for a crosslinking reaction with a selected crosslinking agent by a reaction that does not involve a free-radical vinyl add...
09/22/1992
5124247Process for sequencing nucleic acids
For the sequencing of nucleic acids by enzymatic extension of an oligonucleotide primer in the presence of a polymerase, the four deoxyribonucleoside triphosphates, one of the four dideoxynucleoside triphosphates and the nucleic acid to be sequenced as te...
06/23/1992
5100778Oligosaccharide sequencing
A method of oligosaccharide sequencing in which the components are determined essentially simultaneously is disclosed which comprises a series of steps as follows: A. Placing an identifying label on the reducing terminal residue of the oligosaccharide to ...
03/31/1992
5068019Electrophoresis film support
An electrophoresis film support particularly useful for the electrophoretic separation of serum proteins. According to one aspect, the electrophoresis film support comprises a microporous polymer membrane sheet containing therein an additive which is sele...
11/26/1991
5057438Electrophoretic antigen-antibody determination with laminate of multiple membranes
Determination of a plurality of species of antibodies or antigens is attained by a method which comprises forming a plurality of different kinds of reaction membranes each having a different species of antibody or antigen on an electrophoretic carrier, su...
10/15/1991
4966792Method of producing gradient gel medium membrane for electrophoresis
A method for producing gradient gel medium membrane for electrophoresis for determining the base sequence of DNA or DNA partially decomposed material providing an improved productivity. High and low concentration monomer solutions are mixed with a predete...
10/30/1990
4849077Process for solid phase-sequencing of nucleic acid fragments
A process for solid phase sequencing of nucleic acid fragments is disclosed. The object of the invention is to provide a sequencing process which enables the simultaneous sequencing of large amounts of long and short nucleic acid fragments and which is op...
07/18/1989
4771384System and method for fragmentation mapping
A system and method for the construction of one-dimensional maps from fragmentation data is disclosed. Particularly useful for construction of restriction maps of DNA, the system and method completely permutes sites, single digest fragments, and any avail...
09/13/1988
4746551Rehydratable polyacrylamide gels
The present invention relates to rehydratable polyacrylamide gels. The rehydratable gels can be stored at room temperature for long periods of time and rehydrated with various materials to provide a suitable matrix for various electrophoretic separations....
05/24/1988
4707236Method of farbricating an optically graded light occluding gel
The invention pertains to an electrophoretic technique for fabricating a progressively graded concentration of dye in a hydrophilic polymeric matrix or gel. A charged dye or dye precursor is caused to migrate under the influence of an electrical potential...
11/17/1987
4661451Methods for immobilizing and translocating biological cells
Apparatus for immobilizing biological cells based on the dielectric properties of biological cells. An inhomogeneous electric field emanating from a grid point location or other contact area is created and attracts the biological cell into contact therewi...
04/28/1987
4609707Synthesis of polymers containing integral antibodies
A method is disclosed for the de novo synthesis of antibody-containing polymers and the preparation of a class of polymerizable compounds used in the synthesis of such antibody-containing polymers. Antibody-containing polymers formed from monomer/antibody...
09/02/1986
4541910Method for electroblotting macromolecules from a chromatographic gel
An improved method of electroblotting macromolecules from a chromatographic gel is claimed. The method comprises a design for wire electrode arrays that are capable of generating either highly uniform or controlled predetermined gradient electric fields. ...
09/17/1985
4298441Method of preserving the electrophoretic properties of lipoproteins
A method of preserving the electrophoretic properties of lipoproteins in human or animal plasma, plasma fractions or sera, in which the lipoprotein pattern is to be electrophoretically determined, consists in that non-reducing sugars are added to the plas...
11/03/1981
4290911Agarose composition, aqueous gel and method of making same
A finely-divided solid blend of (1) purified agarose having an electroendosmosis value (-Mr) below 0.10 with (2) a water-soluble gum which by itself is soluble in boiling water without gelling, free from charged groups and from electroendosmosis, and solu...
09/22/1981
4200508Method and composition for detecting antigenic substances
A method and composition for detecting an antigenic substance by immunodiffusion using an antigenic substance to be detected labeled by a chromogenic enzyme. According to the method and the detection material of this invention, even a small amount of an a...
04/29/1980
4146454Electromolecular propulsion in diverse semiconductive media
This application is directed to an electromotive process for exciting a chemical species which includes orientating, re-positioning and transporting and for the separation of chemical species on a support. Unlike conventional semiconductive technology in ...
03/27/1979
4006069Support for electrophoretic analysis
A support for use in electrophoretic analysis comprising a porous polymeric flat plate such as filter paper, cellulose acetate or a non-woven fabric and a polymeric gel, such as polyacrylamide gel, enclosed in the open cells of the flat plate. The gel mem...
02/01/1977
3984298Electromolecular propulsion in semiconductive media
This application is directed to a high-voltage electromotive process to excite a chemical species, which includes orientating, re-positioning and transporting and for the separation of chemical species on a support. Unlike conventional semiconductive tech...
10/05/1976
3975162Applying reagent to medium and device therefor
Device for applying a measured quantity of water-soluble or water-dispersible reagent to a water-containing solid medium for use in molecular diffusion or affinity separation procedures is provided in the form of a film consisting essentially of a film-fo...
08/17/1976
            7  
 
Sign InRegister
Username  
Password   
forgot password?