How many patents does Lhoist Rech Et Developpement Sa have in patentsdb?

Lhoist Rech Et Developpement Sa is linked to 84 publications as assignee in our database.

What technology areas does Lhoist Rech Et Developpement Sa patent most?

Top mapped technology areas by patent count: Chemistry & Metallurgy (67); Operations & Transport (34); Cross-Sectional Technologies (29).

In our data, assignee counts were 9 in 2024 and 9 in 2025 (similar year over year).

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

Lhoist Rech Et Developpement Sa holds 84 patents in our database, with recent filings and technology areas summarized below.

Year-over-year patent counts for this assignee.

Filing activity over the last five years is stable.

Latest publications where this party is an assignee.

Representative or frequently cited publications from precomputed assignee stats.

Mapped technology topics for this assignee.

Company technology slices
Technology	Patents
Chemistry & Metallurgy	67
Operations & Transport	34
Cross-Sectional Technologies	29
Mechanical Engineering	23
Fixed Constructions	3

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

How many patents does Lhoist Rech Et Developpement Sa have in patentsdb?: Lhoist Rech Et Developpement Sa is linked to 84 publications as assignee in our database.
What technology areas does Lhoist Rech Et Developpement Sa patent most?: Top mapped technology areas by patent count: Chemistry & Metallurgy (67); Operations & Transport (34); Cross-Sectional Technologies (29).
Is Lhoist Rech Et Developpement Sa's patent activity growing?: In our data, assignee counts were 9 in 2024 and 9 in 2025 (similar year over year).
What are recent patents assigned to Lhoist Rech Et Developpement Sa?: See the “Recent patents” section above for the latest 5 publications we attribute to this assignee.