Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Frederick D. Watson — 5 Patents

PEPetrolite: 5 patents #19 of 143Top 15%
Houston, TX: #4,540 of 21,073 inventorsTop 25%
Texas: #28,633 of 125,132 inventorsTop 25%
Overall (All Time): #907,971 of 4,157,543Top 25%
5 Patents All Time
Frederick D. Watson has been granted 5 US patents while listed as an inventor at Petrolite. The first was granted in 1980 and the most recent in September 1986. Frederick D. Watson ranks #907,971 of 4,157,543 US inventors in our database (top 21.8%). Patent records list Frederick D. Watson in Houston, TX, US.

Patents per Year

Patents granted per year, 1980 to 1986Bar chart with a peak of 2 patents in 1981.peak 21980: 1 patents19801981: 2 patents19811983: 1 patents19831986: 1 patents1986

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
4609010 Fluid inlet distributor 1986-09-02 $1,809,000
4372837 Radial flow electrofilter Weldon D. Mayse, Albert D. Franse 1983-02-08 $1,107,000
4302310 Radial flow electrofilter Weldon D. Mayse, Albert D. Franse 1981-11-24 $1,215,000
4269681 Radial flow electrofilter Weldon D. Mayse, Albert D. Franse 1981-05-26 $1,364,000
4226689 Apparatus and process for electrically resolving emulsions Weldon D. Mayse 1980-10-07 $1,032,000