Inventor
David C. Rohlfing
Inventor
Bartlesville, OK, US
Overview
Patents· 27 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C08Fprimary
C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds29%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests17%
Y10TTechnical subjects covered by former us classification14%
C08LCompositions of macromolecular compounds10%
C07FAcyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium8%
G01NInvestigating or analysing materials by determining their chemical or physical properties6%
F16LPipes4%
B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form2%
C08JWorking-up2%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry1%
PatentTitleYear
8,933,175'Hyperbranched polymers and methods of making and using same'20158,932,975'Catalyst systems and methods of making and using same'20158,771,816'Controlling melt fracture in bimodal resin pipe'20148,637,691'Polymerization catalysts for producing polymers with low melt elasticity'20148,475,899'Process for producing broader molecular weight distribution polymers with a reverse comonomer distribution and low levels of long chain branches'20138,450,437'Polymerization catalysts for producing polymers with low melt elasticity'20138,119,553'Polymerization catalysts for producing polymers with low melt elasticity'20128,114,946'Process for producing broader molecular weight distribution polymers with a reverse comonomer distribution and low levels of long chain branches'20128,048,679'Method for employing SEC-FTIR data to predict mechanical properties of polyethylene'20117,829,646'Olefin polymers, method of making, and use thereof'20107,803,629'Method for employing SEC-FTIR data to predict mechanical properties of polyethylene'20107,732,542'Polymerization catalysts for producing high molecular weight polymers with low levels of long chain branching'20107,652,160'Polymerization catalysts for producing high molecular weight polymers with low levels of long chain branching'20107,589,162'Polyethylene compositions and pipe made from same'20097,576,163'Polymerization catalysts for producing polymers with low levels of long chain branching'20097,547,754'Organometal compound catalyst'20097,517,939'Polymerization catalysts for producing high molecular weight polymers with low levels of long chain branching'20097,417,097'Organometal compound catalyst'20087,056,744'Measurement of short chain branching in olefin copolymers using chemometric analysis'20066,867,278'Olefin polymers, method of making, and use thereof'20056,833,338'Organometal compound catalyst'20046,632,680'Measurement of short chain branching in olefin copolymers using chemometric analysis'20036,384,161'Method and catalyst system for producing polyolefins with broadened molecular weight distributions'20026,355,359'Polyethylene film'20026,214,469'Films comprising metallocene catalyzed polyethylene'20015,710,224'Method for producing polymer of ethylene'19984,628,013'Photoelectrochemical cell'1986Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1986–2008Patents assigned to PHILLIPS PETROLEUM CO (8)· patent assignee history
1986–2014Based in Bartlesville, OK, US· patent location history
2005–2015Patents assigned to CHEVRON PHILLIPS CHEMICAL CO (16)· patent assignee history
2012–2015Patents assigned to MCDANIEL MAX P (6)· patent assignee history
2012–2015Patents assigned to ROHLFING DAVID C (6)· patent assignee history
2012–2015Patents assigned to YANG QING (6)· patent assignee history
2014–2015Based in Bloomington, IN, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| CHEVRON PHILLIPS CHEMICAL CO | 16 | 2005–2015 |
| PHILLIPS PETROLEUM CO | 8 | 1986–2008 |
| MCDANIEL MAX P | 6 | 2012–2015 |
| ROHLFING DAVID Cself | 6 | 2012–2015 |
| YANG QING | 6 | 2012–2015 |
Locations
| Location | Patents | Span |
|---|---|---|
| Bartlesville, OK, US | 24 | 1986–2014 |
| Bloomington, IN, US | 3 | 2014–2015 |