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Patent Information from Chemical Abstracts Service Patent Information from CAS Patent Information from Chemical Abstracts Service Coverage and Content Chemical Abstracts Service A Division of the American Chemical Society 2540 Olentangy River Road P.O. Box 3012 Columbus, Ohio 43210 © 2001 by the American Chemical Society Quoting or copying of material from this publication for educational purposes is encouraged, providing acknowledgement is made of the source of such material. TABLE OF CONTENTS INTRODUCTION ............................................................................................................................................. 1 PATENT SELECTION ...................................................................................................................................... 2 Overview ........................................................................................................................................................... 2 Selection by Country ......................................................................................................................................... 2 Selection of Kind of Document ......................................................................................................................... 3 Selection by International Patent Classification ................................................................................................ 4 Identification of Patent Families ....................................................................................................................... 4 Examination by Patent Document Analysts ...................................................................................................... 4 Domestically-Related Patent Documents .......................................................................................................... 4 History of Patent Coverage by CAS .................................................................................................................. 5 PATENT INDEX ............................................................................................................................................... 6 OVERVIEW OF PATENT INFORMATION FROM CAS ............................................................................... 7 Printed CA ......................................................................................................................................................... 7 Online Access .................................................................................................................................................... 8 BIBLIOGRAPHIC DATA ................................................................................................................................. 9 ABSTRACTS .................................................................................................................................................. 12 OVERVIEW OF INDEXING.......................................................................................................................... 13 KEYWORDS .................................................................................................................................................. 14 GENERAL SUBJECT INDEX ENTRIES ...................................................................................................... 15 Classes of Compounds .................................................................................................................................... 16 Uses and Applications of Substances .............................................................................................................. 16 CHEMICAL SUBSTANCE INDEX ENTRIES ............................................................................................. 17 General Guidelines for Indexing of Specific Substances ................................................................................ 17 Indexing of Specific Substances: Special Cases ............................................................................................. 22 Compounds Indexed from Markush Structures ............................................................................................... 26 Nonspecific General Derivatives ..................................................................................................................... 26 History of Guidelines for Indexing of Specific Compounds ........................................................................... 28 APPENDIX Patent Coverage by Country and Type of Patent Document ........................................................................... 29 CODEN for Patents ......................................................................................................................................... 33 Patent Kind Codes ........................................................................................................................................... 34 IPC Selection Table Prior to 1996 ................................................................................................................... 39 IPC Selection Tables (1996-June 2000) .......................................................................................................... 55 IPC Selection Tables (July 2000- ) .................................................................................................................. 77 1 INTRODUCTION Chemical Abstracts Service (CAS) has covered patents since the first issue of Chemical Ab- stracts (CA) was published in 1907. The first issue of CA contained 181 patent abstracts, and patent abstracts made up over 30% of all the abstracts published in Volume 1 of CA. Since 1907 CAS has abstracted and indexed over 3.3 million patent documents from all over the world in all areas of chemistry and chemical engineering. More than 2.6 million patents abstracted since 1967 are available online. For the past few years CAS has been adding almost 120,000 new abstracts for patents every year. Patent abstracts now comprise 17 to 18% of the 700,000 abstracts published in CA annually. The purpose of this documentation is to clarify procedures and guidelines for the selection of patent documents for the CAS database and to describe the content of the database. This documenta- tion includes extensive discussion of the guidelines for preparation of abstracts and for indexing the specific compounds and general subject matter of patent documents. The discussion of the abstract- ing and indexing guidelines is based on documentation for CAS patent document analysts. Unless otherwise indicated, currently used guidelines and procedures are described. Also, only general indexing guidelines are described rather than subject specific guidelines for indexing in various areas of chemistry and chemical engineering. Finally, this documentation makes no attempt to teach the searching of either the indexes to printed CA or the CAS online database. Its aim is only to provide information on the coverage and content of patent documents in the CAS database. Instructional materials and workshops on search- ing printed CA or CAS files are available from Chemical Abstracts Service. If you have comments or suggestions related to the content of this documentation or the guide- lines for the selection, coverage or indexing of patent documents by CAS, please direct them to: David W. Weisgerber Editor Chemical Abstracts Service 2540 Olentangy River Road Columbus, OH 43210 Telefax: (614) 447-3713 Telex: 6 842 086 CHMAB 2 PATENT SELECTION Overview There are four main steps in the process of patent selection by CAS. The first three steps depend on a computerized system for the selection of patents from a computer tape supplied every week by the International Patent Documentation Center (INPADOC). The tape contains bibliographic records for the most recently published patent documents from the countries covered by INPADOC. In the first two steps, chemical patents are selected from the countries covered by CAS. Then a determina- tion is made to see if the record selected already has a patent family member that has been abstracted by CAS. If a record belongs to a family that has a previously abstracted member, the record is termed an “equivalent,” and the entire family, along with the abstract citation, is cited in the weekly issued Patent Index. If the record does not have a family member that has already been abstracted, it is termed a CA “basic,” that is, the family member first received by CAS. Only the basic patent documents are obtained for abstracting and indexing. In the final step, each of these patents is examined by a technical specialist who decides if the patent is suitable for inclusion in CA. Selection by Country The first step in patent selection is to select, from the countries covered on the INPADOC weekly tape, those records that correspond to the countries and two international organizations currently included in CA. Table I lists countries from which patent documents are currently selected. For some of the countries on the list abstracts are prepared for patent documents assigned only to individuals or organizations from the granting country. All equivalent patents issued by any of the patent offices covered by CAS, are cited in the Patent Index regardless of the nationality of the inventors. For example, a Finnish patent document is abstracted and indexed when it is issued to a Finnish com- pany or an individual residing in Finland. However, if a United States company files a patent appli- cation in Finland, the resulting
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