PATENTS   
Patents > Guidance, Tools, and Manuals > Classification > Class Schedule
    Class Numbers & Titles   | Class Numbers Only   | USPC Index   | International   | HELP  
You are viewing a USPC Schedule.
Class   23CHEMISTRY: PHYSICAL PROCESSES
Click here for a printable version of this file
  Turn Outline  
     Expand/Contract Processing Please Wait
[List of Pre Grant Publications for class 23 subclass 293R][List of Patents for class 23 subclass 293R]  293R PHYSICAL PROCESSES
[List of Pre Grant Publications for class 23 subclass 294R][List of Patents for class 23 subclass 294R]  294R Subclass 294R indent level is 1 Sublimation
 [List of Pre Grant Publications for class 23 subclass 294S][List of Patents for class 23 subclass 294S]294S Subclass 294S indent level is 2 Sulfur
[List of Pre Grant Publications for class 23 subclass 295R][List of Patents for class 23 subclass 295R]  295R Subclass 295R indent level is 1 Crystallization
[List of Pre Grant Publications for class 23 subclass 296][List of Patents for class 23 subclass 296]296 Subclass 296 indent level is 2 Selective
 [List of Pre Grant Publications for class 23 subclass 299][List of Patents for class 23 subclass 299]299 Subclass 299 indent level is 2 With extraction
[List of Pre Grant Publications for class 23 subclass 300][List of Patents for class 23 subclass 300]300 Subclass 300 indent level is 2 With added material
[List of Pre Grant Publications for class 23 subclass 302R][List of Patents for class 23 subclass 302R]  302R Subclass 302R indent level is 2 Alkali metal and ammonium compounds
 [List of Pre Grant Publications for class 23 subclass 304][List of Patents for class 23 subclass 304]304 Subclass 304 indent level is 2 Alkaline earth metal and magnesium compounds
[List of Pre Grant Publications for class 23 subclass 305R][List of Patents for class 23 subclass 305R]  305R Subclass 305R indent level is 2 Heavy metal or aluminum compounds
 [List of Pre Grant Publications for class 23 subclass 295G][List of Patents for class 23 subclass 295G]295G Subclass 295G indent level is 2 Gel
 [List of Pre Grant Publications for class 23 subclass 295S][List of Patents for class 23 subclass 295S]295S Subclass 295S indent level is 2 Solar
[List of Pre Grant Publications for class 23 subclass 306][List of Patents for class 23 subclass 306]306 Subclass 306 indent level is 1 Concentration of liquids in liquids
 [List of Pre Grant Publications for class 23 subclass 307][List of Patents for class 23 subclass 307]307 Subclass 307 indent level is 2 With direct heating
[List of Pre Grant Publications for class 23 subclass 308R][List of Patents for class 23 subclass 308R]  308R Subclass 308R indent level is 1 Melting out
 [List of Pre Grant Publications for class 23 subclass 308S][List of Patents for class 23 subclass 308S]308S Subclass 308S indent level is 2 Sulfur
[List of Pre Grant Publications for class 23 subclass 313R][List of Patents for class 23 subclass 313R]  313R Subclass 313R indent level is 1 Agglomerating
 [List of Pre Grant Publications for class 23 subclass 314][List of Patents for class 23 subclass 314]314 Subclass 314 indent level is 2 Carbon
 [List of Pre Grant Publications for class 23 subclass 313AS][List of Patents for class 23 subclass 313AS]313AS Subclass 313AS indent level is 2 Silicate
 [List of Pre Grant Publications for class 23 subclass 313FB][List of Patents for class 23 subclass 313FB]313FB Subclass 313FB indent level is 2 Fluidized bed
 [List of Pre Grant Publications for class 23 subclass 313P][List of Patents for class 23 subclass 313P]313P Subclass 313P indent level is 2 Pan agglomeration
 [List of Pre Grant Publications for class 23 subclass 293S][List of Patents for class 23 subclass 293S]293S Subclass 293S indent level is 1 Sulfur
 [List of Pre Grant Publications for class 23 subclass 293A][List of Patents for class 23 subclass 293A]293A Subclass 293A indent level is 1 Flaking, spraying
 
FOREIGN ART COLLECTIONS
 
      FOR000          CLASS-RELATED FOREIGN DOCUMENTS

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 usptoinfo@uspto.gov .

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 webmaster@uspto.gov. While we cannot promise to accommodate all requests, your suggestions will be considered and may lead to other improvements on the website.


|.HOME | SITE INDEX| SEARCH | eBUSINESS | HELP | PRIVACY POLICY