Ampholytes; Electroneutral compounds {(C11D1/002, C11D1/004, C11D1/008 take precedence)}

Ampholytes; Electroneutral compounds {(C11D1/002, C11D1/004, C11D1/008 take precedence)} · Cooperative Patent Classification (CPC)

Chemical and metallurgical processes, compounds, and materials.

Related technology areas

Mapped technology topics for this CPC code.

CPC classification statistics
MetricValue
CPC codeC11D1/88
Official titleAmpholytes; Electroneutral compounds {(C11D1/002, C11D1/004, C11D1/008 take precedence)}
Display labelAmpholytes; Electroneutral compounds {(C11D1/002, C11D1/004, C11D1/008 take precedence)}
Total patents252

Filing trend

Year-over-year patent counts classified under this CPC code.

Filing activity over the last five years is stable.

Patents filed per year
YearPatents
201533
201625
201728
201822
201923
202024
202123
202214
202320
202417
202520
20263

Representative patents

Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.

Frequently asked questions

Answers are generated from the same data shown on this page.

What is CPC C11D1/88?
CPC C11D1/88 is the Cooperative Patent Classification code for “Ampholytes; Electroneutral compounds {(C11D1/002, C11D1/004, C11D1/008 take precedence)}.”
How many patents are filed under CPC C11D1/88 (Ampholytes; Electroneutral compounds {(C11D1/002, C11D1/004, C11D1/008 take precedence)})?
Our database includes 252 publications tagged with this CPC code.
Is patent activity under CPC C11D1/88 growing?
Publication counts under this code: 17 in 2024 vs 20 in 2025 (latest complete years).