Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
RC

Robert Chapman — 24 Patents

PPPurdue Pharma: 15 patents #24 of 189Top 15%
PPPurdue Pharmaceuticals: 10 patents #8 of 12Top 70%
RTRhodes Technologies: 10 patents #6 of 27Top 25%
TLThe P.F. Laboratories: 6 patents #4 of 9Top 45%
MAMallinckrodt: 3 patents #116 of 489Top 25%
MEMerial: 2 patents #129 of 414Top 35%
UNUnknown: 1 patents #29,356 of 83,584Top 40%
Hoffmann-La Roche: 1 patents #1,850 of 3,238Top 60%
MMMallinckrodt Medical: 1 patents #63 of 132Top 50%
ESEuro-Celtique S.A.: 1 patents #118 of 215Top 55%
Downingtown, PA: #28 of 472 inventorsTop 6%
Pennsylvania: #2,638 of 74,527 inventorsTop 4%
Overall (All Time): #168,038 of 4,157,543Top 5%
24 Patents All Time
Robert Chapman has been granted 24 US patents while listed as an inventor at Purdue Pharma. The first was granted in 1988 and the most recent in August 2024. Robert Chapman ranks #168,038 of 4,157,543 US inventors in our database (top 4.0%). Patent records list Robert Chapman in Downingtown, PA, US.

Issued Patents All Time

Showing 1–24 of 24 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12060361 Process for preparing oxycodone hydrochloride having less than 25 ppm 14-hydroxycodeinone Lonn S. Rider, Qi-Zhong Hong, Donald J. Kyle, Robert Kupper 2024-08-13
11647859 Tube holder and assembly 2023-05-16
11384091 Process for preparing oxycodone hydrochloride having less than 25 ppm 14-hydroxycodeinone Lonn S. Rider, Qi-Zhong Hong, Donald J. Kyle, Robert Kupper 2022-07-12
11236098 Process for preparing oxycodone hydrochloride having less than 25 ppm 14-hydroxycodeinone Lonn S. Rider, Qi-Zhong Hong, Robert Kupper, Donald J. Kyle 2022-02-01
10696684 Process for preparing oxycodone hydrochloride having less than 25 PPM 14-hydroxycodeinone Lonn S. Rider, Qi-Zhong Hong, Donald J. Kyle, Robert Kupper 2020-06-30
10689389 Process for preparing oxycodone compositions Lonn S. Rider, Qi-Zhong Hong, Donald J. Kyle, Robert Kupper 2020-06-23
10407434 Process for preparing oxycodone compositions Lonn S. Rider, Qi-Zhong Hong, Donald J. Kyle, Robert Kupper 2019-09-10
10259819 Process for preparing oxycodone compositions Lonn S. Rider, Qi-Zhong Hong, Donald J. Kyle, Robert Kupper 2019-04-16
9777011 Process for preparing oxycodone compositions Lonn S. Rider, Qi-Zhong Hong, Donald J. Kyle, Robert Kupper 2017-10-03
9522919 Oxycodone compositions Lonn S. Rider, Qi-Zhong Hong, Donald J. Kyle, Robert Kupper 2016-12-20
9073933 Oxycodone hydrochloride having less than 25 PPM 14-hydroxycodeinone Lonn S. Rider, Qi-Zhong Hong, Donald J. Kyle, Robert Kupper 2015-07-07
9044453 Long-acting injectable moxidectin formulations and novel moxidectin crystal forms Susan Mancini Cady, Baoqing Ma, Chunhua Yang, Uday Jain 2015-06-02 $60,534,000
8822687 8a,14-dihydroxy-7,8-dihydrocodeinone Lonn S. Rider, Qi-Zhong Hong, Donald J. Kyle, Robert Kupper 2014-09-02
8715711 Long-acting injectable moxidectin formulations and novel moxidectin crystal forms Susan Mancini Cady, Baoqing Ma, Chunhua Yang, Uday Jain 2014-05-06 $63,658,000
7683072 Oxycodone hydrochloride having less than 25 ppm 14-hydroxycodeinone Lonn S. Rider, Qi-Zhong Hong, Donald J. Kyle, Robert Kupper 2010-03-23
7674800 Oxycodone hydrochloride having less than 25 PPM 14-hydroxycodeinone Lonn S. Rider, Qi-Zhong Hong, Donald J. Kyle, Robert Kupper 2010-03-09
7674799 Oxycodone hydrochloride having less than 25 ppm 14-hydroxycodeinone Lonn S. Rider, Qi-Zhong Hong, Donald J. Kyle, Robert Kupper 2010-03-09
7674798 Oxycodone hydrochloride having less than 25 ppm 14-hydroxycodeinone Lonn S. Rider, Qi-Zhong Hong, Donald J. Kyle, Robert Kupper 2010-03-09
7129248 Process for preparing oxycodone hydrochloride having less than 25 ppm 14-hydroxycodeinone Lonn S. Rider, Qi-Zhong Hong, Donald J. Kyle, Robert Kupper 2006-10-31
6156894 Process for manufacturing .alpha..sub. 1L-adrenoceptor antagonists Jolyon Francis Perkins 2000-12-05
5155256 Process for preparing 2-bromoethyl acetate 1992-10-13 $9,602,000
5013865 Process for the preparation of 2,4,6-triiodo-5-amino-N-alkylisophthalamic acid and 2,4,6-triiodo-5-amino-isophthalamide compounds Gregory D. Cross 1991-05-07 $13,267,000
4843169 Method of preparing alpha-arylalkanoic esters 1989-06-27 $2,322,000
4730077 Method of preparing .alpha.-arylalkanoic esters 1988-03-08 $5,997,000