International Patent Classification IPC

During the years 1967 to 1981 (Vol. 66-95) Chemical Abstracts Service recorded only one IPC per document, from 1982 on there were up to twenty. Until the middle of 1986 all IPCs were put into the field IC, afterwards this field (IC) was divided into two fields  

Though a query in the field IC will search the fields ICM and ICS, it is also possible to specify just one of them. 

BOl J Chemical or physical processes, e.g. catalysis, colloid chemistry  

B01J002 Processes or devices for granulating materials, in general 

BOl J002-02 by dividing the liquid material into drops, e.g. by spraying, and 

---

International patent documents, 18 198 International Patent Classification (IPC) system, 18 208—210 International petroleum specifications, 18 642... 

This book is an attempt to describe the evolution of mercury cadmium telluride (HgCdTe) imager structures based on published patents and patent applications. Most of the patent documents cited in this book originate from the part of the systematic documentation at the European Patent Office (EPO) which corresponds to the International Patent Classification (IPC) H01L27/14 1. 

The bibliographic data, full text or claims, and abstracts of all patents from one or more countries are available in a great many databases, both through traditional search services and via the Internet. Patents and applications issued by the U.S., EPO, and WIPO (PCT) are available from most major search services. Patents and/or published patent applications can be searched through the text of abstract, claims and disclosure. International Patent Classification (IPC) or national patent classification codes, relevant dates, and the names of inventors and patentees. 

A related database is provided through Chemweb the IFI Claims database (http //www.chemweb.com/databases/ claims) provides text-searchable information on claims in US patents from 1950 (chemical patents) and 1963 (utilities patents) to the present day. As well as non-specific search methods, the interface on Chemweb permits searching by Boolean combinations of title, inventor, exemplary claim(s), assignee, patent number, application number, US patent classifications or international patent classifications (IPCs). Search terms may be stemmed for additional flexibility. 

End-of-pipe technologies are recorded by the German Patent Office in the class C02F of the International Patent Classification (IPC) Treatment of water, waste water, sewage or sludge. This class is further divided into six subclasses ... 

Fig. 4. Example of international patent classification (stmctured, hierarchical), where numbers ia square brackets identify edition of IPC ia which class was first used. In C07c 45/50, the first four characters iadicate section C (chemistry). Class 07 (organic chemistry), and subclass c (acycHc compounds) the number 45 /00 iadicates the preparation of compounds having carbonyl groups bound only to carbon or hydrogen atoms by any method and 45 /50...

Paterra have prepared a guide (http //cxp.paterra. com/FTerms/Guide.htm) to compare the Japanese F-term system with the International Patent Classification (IFC) (http //www.wipo.int/classitications/fuIltext/new ipc/) and File Index classification system. The guide is a browseable... 

Adams SR. Comparing the IPC and the US Classification Systems for the Patent Searcher. World Patent Inf. 2001 23 15-23. A comparison of the organizational philosophies of the International Patent Classification system and the U.S. national classification system and the differences in information retrieval that result. 

Patent classifications divide the entire set of U.S. and international patents into searchable collections based on the technology claimed in that patent. The primary U.S. patent groupings, called Classes, are divided into more specific Subclasses, which in some cases are further subdivided in Subsubclasses. On the other hand, the International Patent Classes (IPC) specifies the Class, Subclass, Group, and Subgroup. The EPO s European Patent Classification (ECLA) is assuming greater importance, since it further subdivides the IPC. 

Fuel cell manufacturing patents are filed mainly under the International Patent Classification Code (IPC) H01M008. 

---