Albert Pfiffner has been granted 12 US patents while listed as an inventor at Hoffmann-La Roche . The first was granted in 1980 and the most recent in September 2000. Albert Pfiffner ranks #396,045 of 4,157,543 US inventors in our database (top 9.5%). Patent records list Albert Pfiffner in Bülach, CH.
Patents per Year Patents granted per year, 1980 to 2000 Bar chart with a peak of 4 patents in 1980. peak 4 1980: 4 patents 1980 1981: 1 patents 1981 1983: 1 patents 1983 1987: 1 patents 1987 1994: 1 patents 1994 1997: 1 patents 1997 1998: 2 patents 1998 2000: 1 patents 2000
Issued Patents All Time
Profile Widget
Showing 1–12 of 12 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
6124493 Process for the preparation of o-chloromethyl-phenylglyoxylic acid derivatives Jean-Marie Assercq , Hans-Dieter Schneider , Werner Pfaff 2000-09-26
$1,005,000
5756811 Process for the preparation of o-chloromethyl-phenylglyoxylic acid derivatives Jean-Marie Assercq , Hans-Dieter Schneider , Werner Pfaff 1998-05-26
5710314 Microbicides Stephan Trah 1998-01-20
5606095 2-aminooxymethylenephenylacetic acid derivatives Stephan Trah , Hugo Ziegler 1997-02-25
5288928 Asymmetrical hydrogenation Emil A. Broger , Yvo Crameri , Hans P. Isenring 1994-02-22
4678790 Certain .alpha.-benzyl-3-pyridylmethanols, N-oxides thereof and their fungicidal use Franz Dorn , Beat Zehnder 1987-07-07
4384116 Process for the preparation of morpholine and piperidine derivatives — 1983-05-17
4270009 1,4-Bis-[(2-propynyloxy)-methyl] cyclohexane Silvia Dorn , Rene Zurfluh 1981-05-26
4241058 Heterocyclics useful as fungicides and fungicidal compositions thereof — 1980-12-23
4235932 Pesticidal 1,4-bis-[(-propynyloxy)-methyl]-benzene and 1,4-bis-[(2-propynyloxy)-methyl] cyclohexane Silvia Dorn , Rene Zurfluh 1980-11-25
4234598 Phenylcarbamates Madhukar Subraya Chodnekar , Peter Loeliger , Ulrich Schwieter , Milos Suchy , Rene Zurflun 1980-11-18
4202894 Piperidines morpholines, etc., and fungicidal compositions thereof — 1980-05-13
