Inventor · disambiguated record
Donald F. Birkelbach
Also filed as: BIRKELBACH DONALD F · LOWERY KIRBY JR
12 granted patents·168 citations·filing 1976–1983
91Inventor score
Technology areasC08F
Files withDOW CHEMICAL CO12
Top patents by PatentIndex Score
12 records- 0190US4120820AHigh efficiency catalyst for polymerizing olefinsDOW CHEMICAL CO·Filed 1976·Granted Oct 17, 1978·49 cites·7 claims
- 0276US4198315AHigh efficiency catalyst for polymerizing olefinsDOW CHEMICAL CO·Filed 1978·Granted Apr 15, 1980·19 cites·14 claims
- 0370US4308369AHigh efficiency catalyst for polymerizing olefinsDOW CHEMICAL CO·Filed 1980·Granted Dec 29, 1981·19 cites·24 claims
- 0468US4189553AHigh efficiency catalyst for polymerizing olefinsDOW CHEMICAL CO·Filed 1978·Granted Feb 19, 1980·14 cites·8 claims
- 0567US4224186AHigh efficiency catalyst for polymerizing olefinsDOW CHEMICAL CO·Filed 1979·Granted Sep 23, 1980·12 cites·9 claims
- 0663US4399053AHigh efficiency catalyst containing titanium, zirconium and zinc for polymerizing olefinsDOW CHEMICAL CO·Filed 1980·Granted Aug 16, 1983·14 cites·7 claims
- 0760US4380508AUltra high efficiency catalyst for polymerizing olefinsDOW CHEMICAL CO·Filed 1981·Granted Apr 19, 1983·12 cites·17 claims
- 0856US4409126AUltra high efficiency catalyst for polymerizing olefinsDOW CHEMICAL CO·Filed 1981·Granted Oct 11, 1983·10 cites·10 claims
- 0955US4238355AHigh efficiency catalyst for polymerizing olefinsDOW CHEMICAL CO·Filed 1979·Granted Dec 9, 1980·8 cites·14 claims
- 1045US4451626AProcess for polymerizing alpha-olefinsDOW CHEMICAL CO·Filed 1983·Granted May 29, 1984·6 cites·35 claims
- 1137US4323665AHigh efficiency catalyst for polymerizing olefinsDOW CHEMICAL CO·Filed 1980·Granted Apr 6, 1982·3 cites·24 claims
- 1235US4243785AHigh efficiency catalyst for polymerizing olefinsDOW CHEMICAL CO·Filed 1978·Granted Jan 6, 1981·2 cites·19 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →