Refractive index

Refractive index · 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 codeA61K6/16
Official titleRefractive index
Display labelRefractive index
Total patents176

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
201515
201615
201713
201811
201918
202015
202114
202216
202317
202417
202521
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 A61K6/16?
CPC A61K6/16 is the Cooperative Patent Classification code for “Refractive index.”
How many patents are filed under CPC A61K6/16 (Refractive index)?
Our database includes 176 publications tagged with this CPC code.
Is patent activity under CPC A61K6/16 growing?
Publication counts under this code: 17 in 2024 vs 21 in 2025 (latest complete years).