Inventor
David R. Johnson
Inventor
Midland, MI, US
Overview
Patents· 53 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C10Gprimary
C10GCracking hydrocarbon oils14%
G01NInvestigating or analysing materials by determining their chemical or physical properties9%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests9%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry7%
C25CProcesses for the electrolytic production, recovery or refining of metals7%
A61FFilters implantable into blood vessels5%
H01JElectric discharge tubes or discharge lamps5%
H10PGeneric processes or apparatus for the manufacture or treatment of devices covered by class h105%
B22CFoundry moulding4%
C08JWorking-up4%
PatentTitleYear
9,839,560'Wound dressing, ingredient delivery device and IV hold-down, and method relating to same'20179,630,377'Wound dressing, ingredient delivery device and IV hold-down incorporating a statically retained handle member'2017D0685999'Sheet material with camouflage pattern'2013D0686000'Sheet material with camouflage pattern'2013D0679099'Sheet material with camouflage pattern'20137,888,546'Wound dressing, ingredient delivery device and IV hold-down, and method relating to same'20117,585,554'Wound dressing, ingredient delivery device and IV hold-down incorporating a statically retained handle'20097,578,926'Process to enhance oxidation stability of base oils by analysis of olefins using Â1H NMR'20097,332,073'Process for removing contaminants from Fischer-Tropsch feed streams'20087,102,737'Method and apparatus for automated, in situ material detection using filtered fluoresced, reflected, or absorbed light'20066,949,180'Low toxicity Fischer-Tropsch derived fuel and process for making same'20056,838,390'Method and apparatus for plasma etching a wafer'20056,831,734'Method and apparatus for automated, in situ material detection using filtered fluoresced, reflected, or absorbed light'20046,704,107'Method and apparatus for automated, in situ material detection using filtered fluoresced, reflected, or absorbed light'20046,702,937'Process for upgrading Fischer-Tropsch products using dewaxing and hydrofinishing'20046,703,535'Process for upgrading fischer-tropsch syncrude using thermal cracking and oligomerization'20046,700,027'Process for the oligomerization of olefins in Fischer-Tropsch condensate using chromium catalyst and high temperature'20046,605,206'Process for increasing the yield of lubricating base oil from a Fischer-Tropsch plant'20036,509,960'Method and apparatus employing external light source for endpoint detection'20036,429,928'Method and apparatus employing external light source for endpoint detection'20026,369,887'Method and apparatus for automated, in situ material detection using filtered fluoresced, reflected, or absorbed light'20026,268,203'Biological control of purple loosestrife'20016,256,094'Method and apparatus for automated, in situ material detection using filtered fluoresced, reflected, or absorbed light'20016,201,385'Voltage and continuity tester'20016,179,448'Automated light tuner'20016,119,418'Pre-stressed built-up insulated construction panel'20006,113,308'Device for cutting filler material from concrete joints'20006,080,272'Method and apparatus for plasma etching a wafer'20005,969,805'Method and apparatus employing external light source for endpoint detection'19995,733,440'Catalyst, method and apparatus for an on-stream particle replacement system for countercurrent contact of a gas and liquid feed stream with a packed bed'19985,626,150'Extrication vacboard'19975,599,440'Catalyst method and apparatus for an on-stream particle replacement system for countercurrent contact of a gas and liquid feed stream with a packed bed'19975,498,327'Catalyst, method and apparatus for an on-stream particle replacement system for countercurrent contact of a gas and liquid feed stream with a packed bed'19965,472,928'Catalyst, method and apparatus for an on-stream particle replacement system for countercurrent contact of a gas and liquid feed stream with a packed bed'19955,368,889'Method of making thin film composite membranes'19945,089,463'Hydrodemetalation and hydrodesulfurization catalyst of specified macroporosity'19925,053,437'Expandable and expanded plastic materials and methods for casting metal castings employing such expanded cellular plastic materials'19915,051,451'Expandable and expanded plastic materials and methods for casting metal castings employing such expanded cellular plastic materials'19914,983,640'Methods for preparing a formed cellular plastic material pattern employed in metal casting'19914,976,848'Hydrodemetalation and hydrodesulfurization using a catalyst of specified macroporosity'19904,929,645'Expandable and expanded plastic materials and methods for casting metal castings employing such expanded cellular plastic materials'19904,896,437'Insulated boot and gaiter combination'19904,831,778'Upper window sash with projections for simplified sash installation and removal'19894,790,367'Methods for preparing a formed cellular plastic material pattern employed in metal casting'19884,789,462'Reverse-graded catalyst systems for hydrodemetalation and hydrodesulfurization'19884,579,872'Uniform minimization of plastic foam cell size'19864,219,401'Metal electrowinning feed cathode'19804,201,738'Preparation of U.sub.3 O.sub.8'19804,167,468'Apparatus for electrowinning multivalent metals'19794,165,262'Method of electrowinning titanium'19794,118,291'Method of electrowinning titanium'19784,116,801'Apparatus for electrowinning multivalent metals'19784,113,584'Method to produce multivalent metals from fused bath and metal electrowinning feed cathode apparatus'1978Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1978–1994Patents assigned to DOW CHEMICAL CO (12)· patent assignee history
1978–1994Based in Midland, MI, US· patent location history
1988–1992Based in San Francisco, CA, US· patent location history
1990–2017Patents assigned to JOHNSON DAVID R (3)· patent assignee history
1995–2009Based in Petaluma, CA, US· patent location history
1997–2009Patents assigned to CHEVRON USA INC (9)· patent assignee history
1999–2006Patents assigned to MICRON TECHNOLOGY INC (11)· patent assignee history
1999–2006Based in Meridian, ID, US· patent location history
2009–2017Patents assigned to CORIUM INT INC (4)· patent assignee history
2013Based in Knoxville, TN, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| DOW CHEMICAL CO | 12 | 1978–1994 |
| MICRON TECHNOLOGY INC | 11 | 1999–2006 |
| CHEVRON USA INC | 9 | 1997–2009 |
| CORIUM INT INC | 4 | 2009–2017 |
| JOHNSON DAVID Rself | 3 | 1990–2017 |
Locations
| Location | Patents | Span |
|---|---|---|
| Midland, MI, US | 13 | 1978–1994 |
| Petaluma, California, US | 11 | 1995–2009 |
| Meridian, ID, US | 11 | 1999–2006 |
| Knoxville, TN, US | 3 | 2013 |
| San Francisco, California, US | 3 | 1988–1992 |