DERWENT CPI MANUAL CODES
DERWENT WORLD PATENTS INDEX (DWPI - Clarivate
Manual codes can be searched online in the Derwent World Patents Index* on each of the host systems - Dialog, STN and Questelt. Various other search parameters can be combined with manual codes, e.g. International Patent Classifications (IPCs taken from the front page of the patent specification), Derwent Class, and of course, free text.
DWPI Manual Codes - Clarivate
DWPI Manual Codes. The DWPI Manual Code system is divided into technology Sections by letter in the same way as DWPI Classification. There are around 26,000 DWPI Manual codes in total, divided broadly as follows: Sections A-N Chemical Patents Index (CPI), >8,000 codes Sections P&Q General & Mechanical Patents Index, (GMPI),..[PDF]
DERWENT WORLD PATENTS INDEX (DWPI) - Clarivate
Derwent Manual Codes have been developed over a period of more than 50 years, having been first introduced in 1963 when they were applied to patent references of the Farmdoc Service. Subsequently, this service has been renamed Section B and incorporated into the Chemical Patents Index (CPI).
Derwent Cpi Manual Codes | Pdf/ePub Library
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Derwent World Patent Index: The latest Manual Code
The Derwent World Patents Index manual coding system annual revision for 2019 is now complete and is being used by the editorial teams to code records appearing in the database from Derwent Update 201901 onward. The editorial team consistently applies Derwent[PDF]
Derwent Manual Codes - WordPress
Derwent Manual Codes Search for patent records containing this code in the Patent Assignee Name(s) and Search for patent records using in the Derwent Manual Code(s) field. Derwent Manual Code. Patent codes from MC field of WPINDEX files, assigned by Derwent. Default sort order: Descending by document count. Derwent Class. (DWPI).[PDF]
Improved patent searching using DWPI Manual Codes on STN
• In section M and Q-X the manual code (where it exists) is simply a sub-division of the Derwent Class – E.g. all patents classified in T04 will be given T04 manual codes • However in Sections A, B, C & E there is no such simple relationship – A class in one of these sections only ensures manual codes from the
Derwent WPI Manual Code and Text - STN International
A - Polymers and Plastics. A12-A05B (1970- ) ADDITION POLYMER BASED ADHESIVE AND BINDER COMPSNS. A12-A05B1 (1986- ) ACRYLIC ADHESIVE AND BINDER COMPSNS. A12-A05B2 (1986- ) POLYOLEFINS ADHESIVE AND BINDER COMPSNS. A12-A05B3 (1986- ) VINYL HALIDE AND/OR VINYL CARBOXYLATE (CO)POLYMERS ADHESIVE AND BINDER COMPSNS.
STN International: Derwent World Patents Index (DWPI)
DWPI: Latest Manual Code Revision goes live (07 January, 2016) Derwent Markush Resource now available on the new STN platform! (19 November, 2015) Derwent Markush Resource joins MARPAT ® from CAS on new STN ® – The dream of a unified solution for generic chemical structure searching comes true! (14 October, 2015)
Derwent World Patents Index - Wikipedia
Derwent Manual Codes. Derwent produces its own proprietary patent classification codes, called manual codes. The classification system contains subdivisions related to chemical, electrical and mechanical engineering subject matter. Derwent Assignee Codes. Derwent indexers add standardized 4-letter codes to DWPI records to represent certain patent-holding companies.