Spraying in vacuum or in an inert atmosphere

Spraying in vacuum or in an inert atmosphere · 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 codeC23C4/137
Official titleSpraying in vacuum or in an inert atmosphere
Display labelSpraying in vacuum or in an inert atmosphere
Total patents86

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
20156
20163
20179
20187
20198
20208
20218
202214
20236
202412
20255

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 C23C4/137?
CPC C23C4/137 is the Cooperative Patent Classification code for “Spraying in vacuum or in an inert atmosphere.”
How many patents are filed under CPC C23C4/137 (Spraying in vacuum or in an inert atmosphere)?
Our database includes 86 publications tagged with this CPC code.
Is patent activity under CPC C23C4/137 growing?
Publication counts under this code: 12 in 2024 vs 5 in 2025 (latest complete years).