Phosphorus compounds

Phosphorus compounds · Cooperative Patent Classification (CPC)

Agriculture, food, personal care, health, and life sciences.

Related technology areas

Mapped technology topics for this CPC code.

CPC classification statistics
MetricValue
CPC codeA61K8/55
Official titlePhosphorus compounds
Display labelPhosphorus compounds
Total patents709

Filing trend

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

Filing activity over the last five years is declining.

Patents filed per year
YearPatents
201566
201654
201780
201856
201967
202064
202177
202262
202363
202464
202551
20265

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 A61K8/55?
CPC A61K8/55 is the Cooperative Patent Classification code for “Phosphorus compounds.”
How many patents are filed under CPC A61K8/55 (Phosphorus compounds)?
Our database includes 709 publications tagged with this CPC code.
Is patent activity under CPC A61K8/55 growing?
Publication counts under this code: 64 in 2024 vs 51 in 2025 (latest complete years).