Inventor
Thomas Dreifert
Inventor
Kerpen, DE
Overview
Patents· 12 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
F04Cprimary
F04CRotary-piston, or oscillating-piston, positive-displacement machines for liquids71%
LOC1514%
F02BInternal-combustion piston engines7%
F04BPositive-displacement machines for liquids7%
PatentTitleYear
10,465,686Vacuum pump system20199,476,423'Roots pump connection channels separating adjacent pump stages'20169,234,519'Vacuum pump'2016D0630229'Vacuum pump'2011D0617814'Vacuum pump'20107,186,098'Eccentric pump and method for operation of said pump'20077,153,093'Vacuum pump'20066,964,559'Two shaft vacuum pump with cantilevered rotors'20056,863,511'Two-shaft vacuum pump'20056,776,588'Dry compressing vacuum pump having a gas ballast device'20046,544,020'Cooled screw vacuum pump'20036,382,930'Screw vacuum pump provided with rotors'2002Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2002–2006Patents assigned to LEYBOLD VAKUUM GMBH (6)· patent assignee history
2002–2004Based in Kln, DE· patent location history
2005–2019Based in Kerpen, DE· patent location history
2005Based in Köln, DE· patent location history
2007–2016Patents assigned to OERLIKON LEYBOLD VACUUM GMBH (4)· patent assignee history
2016Patents assigned to DREIFERT THOMAS (2)· patent assignee history
2016Patents assigned to JENKINS ROBERT (2)· patent assignee history
2016Patents assigned to BIRCH PETER (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| LEYBOLD VAKUUM GMBH | 6 | 2002–2006 |
| OERLIKON LEYBOLD VACUUM GMBH | 4 | 2007–2016 |
| DREIFERT THOMASself | 2 | 2016 |
| JENKINS ROBERT | 2 | 2016 |
| BIRCH PETER | 1 | 2016 |
Locations
| Location | Patents | Span |
|---|---|---|
| Kerpen, DE | 8 | 2005–2019 |
| Kln, DE | 3 | 2002–2004 |
| Köln, DE | 1 | 2005 |