How many patents does Zhejiang Hengyi Petrochemical Co Ltd have in patentsdb?

Zhejiang Hengyi Petrochemical Co Ltd is linked to 81 publications as assignee in our database.

What technology areas does Zhejiang Hengyi Petrochemical Co Ltd patent most?

Top mapped technology areas by patent count: Physics (76); Cross-Sectional Technologies (40); Operations & Transport (35).

In our data, assignee counts were 7 in 2024 and 52 in 2025 (higher year over year).

See the “Recent patents” section above for the latest 5 publications we attribute to this assignee.

Zhejiang Hengyi Petrochemical Co Ltd holds 81 patents in our database, with recent filings and technology areas summarized below.

Year-over-year patent counts for this assignee.

Filing activity appears to be growing based on the most recent years.

Latest publications where this party is an assignee.

Representative or frequently cited publications from precomputed assignee stats.

Most common classification codes in this portfolio.

Mapped technology topics for this assignee.

Company technology slices
Technology	Patents
Physics	76
Cross-Sectional Technologies	40
Operations & Transport	35
Textiles & Paper	15
Electricity	12
Mechanical Engineering	1

Answers are generated from the same data shown on this page.

How many patents does Zhejiang Hengyi Petrochemical Co Ltd have in patentsdb?: Zhejiang Hengyi Petrochemical Co Ltd is linked to 81 publications as assignee in our database.
What technology areas does Zhejiang Hengyi Petrochemical Co Ltd patent most?: Top mapped technology areas by patent count: Physics (76); Cross-Sectional Technologies (40); Operations & Transport (35).
Is Zhejiang Hengyi Petrochemical Co Ltd's patent activity growing?: In our data, assignee counts were 7 in 2024 and 52 in 2025 (higher year over year).
What are recent patents assigned to Zhejiang Hengyi Petrochemical Co Ltd?: See the “Recent patents” section above for the latest 5 publications we attribute to this assignee.