Tryptophan; Tyrosine; Phenylalanine; 3,4-Dihydroxyphenylalanine

Tryptophan; Tyrosine; Phenylalanine; 3,4-Dihydroxyphenylalanine · 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 codeC12P13/22
Official titleTryptophan; Tyrosine; Phenylalanine; 3,4-Dihydroxyphenylalanine
Display labelTryptophan; Tyrosine; Phenylalanine; 3,4-Dihydroxyphenylalanine
Total patents100

Filing trend

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

Filing activity over the last five years is growing.

Patents filed per year
YearPatents
201510
20167
20179
201810
20198
20207
20218
202212
20238
20247
202510
20264

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 C12P13/22?
CPC C12P13/22 is the Cooperative Patent Classification code for “Tryptophan; Tyrosine; Phenylalanine; 3,4-Dihydroxyphenylalanine.”
How many patents are filed under CPC C12P13/22 (Tryptophan; Tyrosine; Phenylalanine; 3,4-Dihydroxyphenylalanine)?
Our database includes 100 publications tagged with this CPC code.
Is patent activity under CPC C12P13/22 growing?
Publication counts under this code: 7 in 2024 vs 10 in 2025 (latest complete years).