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Example of a Markush structure. A Markush structure, Markush group, or a Markush claim is a representation of alternatively useable members. Markush structures are frequently used with chemical structures to indicate a group of related chemical compounds. They are commonly used in chemistry texts and in patent claims.
A chemical patent, pharmaceutical patent or drug patent is a patent for an invention in the chemical or pharmaceuticals industry.Strictly speaking, in most jurisdictions, there are essentially no differences between the legal requirements to obtain a patent for an invention in the chemical or pharmaceutical fields, in comparison to obtaining a patent in the other fields, such as in the ...
Chemical reactions from the patent literature Chemical reaction SMILES, annotated procedures, characterization data, reference metadata Curated from patent literature "SaguaroChem". 4 July 2024. 2,091,105 SciFinder: Chemical Abstracts Service of American Chemical Society: organic, inorganic chemicals, proteins CASNo paid access only 130,000,000
Example of a Markush structure. The first suggested use for substructure search was in 1957, to reduce the workload of patent examiners. They have to search published literature to decide whether an invention is novel, which for chemical patents often means finding known examples within the generic claims of a Markush structure.
For example, a chemical database might store a molecule with stereochemistry unspecified, whereas a chemical registry system requires the registrar to specify whether the stereo configuration is unknown, a specific (known) mixture, or racemic. Each of these would be considered a different record in a chemical registry system.
Reaxys is a web-based tool for the retrieval of information about chemical compounds and data from published literature, including journals and patents. The information includes chemical compounds, chemical reactions, chemical properties, related bibliographic data, substance data with synthesis planning information, as well as experimental procedures from selected journals and patents.
These patents underlie mature mass production technologies. The largest production capacity is up to 250 tons per month. In patent lawsuits in the US in 2005 and 2006, UT and Hydro-Québec claimed that LiFePO 4 as the cathode infringed their patents, US 5910382 and US 6514640 . The patent claims involved a unique crystal structure and a ...
ChemMantis, [14] the Chemistry Markup And Nomenclature Transformation Integrated System uses algorithms to identify and extract chemical names from documents and web pages and converts the chemical names to chemical structures using name-to-structure conversion algorithms and dictionary look-ups in the ChemSpider database. The result is an ...