How many patents does Castrol Ltd have in patentsdb?

Castrol Ltd is linked to 126 publications as assignee in our database.

What technology areas does Castrol Ltd patent most?

Top mapped technology areas by patent count: Mechanical Engineering (58); Chemistry & Metallurgy (49); Operations & Transport (42).

In our data, assignee counts were 9 in 2024 and 4 in 2025 (lower year over year).

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

Castrol Ltd holds 126 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 rapidly declining.

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
Mechanical Engineering	58
Chemistry & Metallurgy	49
Operations & Transport	42
Physics	17
Cross-Sectional Technologies	16
Electricity	15
Human Necessities	1

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

How many patents does Castrol Ltd have in patentsdb?: Castrol Ltd is linked to 126 publications as assignee in our database.
What technology areas does Castrol Ltd patent most?: Top mapped technology areas by patent count: Mechanical Engineering (58); Chemistry & Metallurgy (49); Operations & Transport (42).
Is Castrol Ltd's patent activity growing?: In our data, assignee counts were 9 in 2024 and 4 in 2025 (lower year over year).
What are recent patents assigned to Castrol Ltd?: See the “Recent patents” section above for the latest 5 publications we attribute to this assignee.