by contacting with solids; Regeneration of used solids

by contacting with solids; Regeneration of used solids · 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 codeC01B3/56
Official titleby contacting with solids; Regeneration of used solids
Display labelby contacting with solids; Regeneration of used solids
Total patents741

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
201535
201638
201741
201862
201962
202064
202166
202289
202373
202494
2025100
202617

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 C01B3/56?
CPC C01B3/56 is the Cooperative Patent Classification code for “by contacting with solids; Regeneration of used solids.”
How many patents are filed under CPC C01B3/56 (by contacting with solids; Regeneration of used solids)?
Our database includes 741 publications tagged with this CPC code.
Is patent activity under CPC C01B3/56 growing?
Publication counts under this code: 94 in 2024 vs 100 in 2025 (latest complete years).