Except for the obvious choice here - CATIA from Dassault Systemes from which CATPRODUCT files originates, it should also be possible to achieve the CATPRODUCT to STEP conversion with the use of several other dedicated CAD conversion programs like CrossManager or similar.
Convert CATIA product description document to ISO-10303 STEP product data.
We found 7 software records in the database related to .catproduct to .step file format conversion.
Microsoft Windows software - convert catproduct to step on Windows
A PLM/CAD/CAM/CAE software suite
Convert from catproduct file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned catproduct to step. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
A CAD converter with huge format support
A widely-used 3D animation application from Autodesk
A set of 3D modeling tools
A dedicated CAD converter
A CAD visualizaton, analyzation and translating system
A CAD viewer program with conversion capabilities