Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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David Keifer — 4 Patents

FMFmc: 3 patents #430 of 1,735Top 25%
TUTrustees Of Indiana University: 1 patents #114 of 337Top 35%
UHUniversity Of North Carolina At Chapel Hill: 1 patents #769 of 1,688Top 50%
Montgomery, NJ: #203 of 505 inventorsTop 45%
New Jersey: #19,535 of 69,400 inventorsTop 30%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
David Keifer has been granted 4 US patents while listed as an inventor at Fmc. The first was granted in 1990 and the most recent in March 2020. David Keifer ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list David Keifer in Montgomery, NJ, US.

Patents per Year

Patents granted per year, 1990 to 2020Bar chart with a peak of 2 patents in 1990.peak 21990: 2 patents19902005: 1 patents20052020: 1 patents2020

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
10585103 Methods and compositions for resolving components of a virus preparation Martin F. Jarrold, Aravind Asokan, Elizabeth Pierson 2020-03-10
6855667 Method for safening crops from the phytotoxic effects of herbicides by use of phosphorated esters 2005-02-15 $12,517,000
H806 Herbicidal clomazone compositions and methods of use tolerant to corn John M. Tymonko, Earl D. Felix, William A. Van Saun 1990-08-07
4909831 Safening of crops against a triazolinone herbicide with 1,8-naphthalic anhydride John M. Tymonko 1990-03-20 $2,391,000