Inventor
Donald N. Campbell
Inventor
Timonium, MD, US
Overview
Patents· 15 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G01Nprimary
G01NInvestigating or analysing materials by determining their chemical or physical properties42%
Y10TTechnical subjects covered by former us classification8%
B05DProcesses for applying fluent materials to surfaces, in general4%
C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds4%
C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds4%
C08JWorking-up4%
C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients4%
C08LCompositions of macromolecular compounds4%
C09DCoating compositions, e.g. paints, varnishes or lacquers4%
C12MApparatus for enzymology or microbiology4%
PatentTitleYear
11,034,857Low temperature cure coating formed via resin-facilitated catalyst migration between layers in a double layer curing mechanism20215,614,417'Sulfur chemiluminescence detection method'19975,053,343'Selective ionization of gas constituents using electrolytic reactions'19915,021,654'All ceramic ion mobility spectrometer cell'19915,013,188'Process for replacing a length of buried pipe'19914,928,033'Thermionic ionization source'19904,839,143'Selective ionization of gas constituents using electrolytic reactions'19894,744,954'Amperometric gas sensor containing a solid electrolyte'19884,712,008'Ion mobility spectrometer'19874,597,299'Ion gate sample gas inlet control for gas chromatograph analyzer'19864,595,486'Electrochemical gas sensor'19864,525,266'Electrochemical gas sensor'19854,525,704'Enzymatic toxic gas sensor'19854,500,391'Method of and system for real time differential pulse detection'19854,378,499'Chemical conversion for ion mobility detectors using surface interactions'1983Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1983Patents assigned to BENDIX CORP (1)· patent assignee history
1983–1991Based in Timonium, MD, US· patent location history
1985–1987Patents assigned to ALLIED CORP (6)· patent assignee history
1988–1989Patents assigned to ALLIED SIGNAL INC (2)· patent assignee history
1990–1991Patents assigned to ENVIRONMENTAL TECH GROUP (3)· patent assignee history
1991Based in Lake Jackson, TX, US· patent location history
1991Based in Sherwood Park, Alberta, CA· patent location history
1997Based in West Columbia, TX, US· patent location history
2021Patents assigned to BASF COATINGS GMBH (1)· patent assignee history
2021Based in Hartland, MI, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| ALLIED CORP | 6 | 1985–1987 |
| ENVIRONMENTAL TECH GROUP | 3 | 1990–1991 |
| ALLIED SIGNAL INC | 2 | 1988–1989 |
| BASF COATINGS GMBH | 1 | 2021 |
| BENDIX CORP | 1 | 1983 |
Locations
| Location | Patents | Span |
|---|---|---|
| Timonium, Maryland, US | 11 | 1983–1991 |
| Hartland, MI, US | 1 | 2021 |
| West Columbia, Texas, US | 1 | 1997 |
| Lake Jackson, Texas, US | 1 | 1991 |
| Sherwood Park, Alberta, CA | 1 | 1991 |