Patents > Guidance, Tools, and Manuals >> Classification >>> Class Definition
    Class Numbers & Titles   | Class Numbers Only   | USPC Index   | International   | HELP  
You are viewing a Class definition.

 [Search a list of Patent Appplications for class 976]   CLASS 976,NUCLEAR TECHNOLOGY
Click here for a printable version of this file


Note the following for Class 976:

(A) Class 976 is used for optional searching.

(B) E-subclasses in USPC Class 976/DIG. 1-DIG. 445 were created as duplicates of EPO groups in G21B through G21Y. With the implementation of CPC, these E-subclasses should no longer be used. Instead, use CPC groups in G21B and its indents through G21Y.

This page is produced by the Office of Classification Support (Office of Patent Classification) for the Reference Tools Project.

Please send questions and comments to .

Note: The Patent and Trademark Depository Library Program (PTDLP) administers a nationwide network of public, state and academic libraries designated as Patent and Trademark Depository Libraries authorized by 35 U.S.C. 13 to: Disseminate Patent and Trademark Information Support Diverse Intellectual Property Needs of the Public. PTDL Contact Information

Note: For information/comments on electronic information products, such as purchasing USPTO data, or to discuss system requirements for magnetic tape products, contact:

     Information Products Division -- U.S. Patent and Trademark Office Information Products Division Contact Information
     Or, browse their on-line catalog.

KEY: e Biz=online business system fees=fees forms=formshelp=help laws and regs=laws/regulations definition=definition (glossary)

The Inventors Assistance Center is available to help you on patent matters.Send questions about USPTO programs and services to the USPTO Contact Center (UCC). You can suggest USPTO webpages or material you would like featured on this section by E-mail to the While we cannot promise to accommodate all requests, your suggestions will be considered and may lead to other improvements on the website.