Inventor
Emile Levallois
Inventor
Courbevoie, FR
Overview
Patents· 12 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling27%
F04DNon-positive-displacement pumps13%
G01SRadio direction-finding10%
Y10TTechnical subjects covered by former us classification10%
B08BCleaning in general7%
E21CMining or quarrying7%
F04BPositive-displacement machines for liquids7%
F16LPipes7%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests7%
C10BDestructive distillation of carbonaceous materials for production of gas, coke, tar, or similar materials3%
PatentTitleYear
5,855,742'Decoking process and device'19995,494,067'Device for regulating and damping a multiphase flow'19965,460,193'Method and device for cleaning the walls of a container'19955,421,357'Process for optimizing a device for regulating and damping a multiphase flow and device obtained with the process'19955,393,202'Process and device for optimizing the transfer by pumping of multiphase effluents'19955,377,714'Device and method for transferring a multiphase type effluent in a single pipe'19954,789,970'Method and device for positioning an element using ultrasonic sensors'19884,619,762'Devices for recovering polymetal compounds discharged from a submarine hydrothermal source'19864,591,293'Method and device for placing in a determined relative position two elements submerged in a conducting liquid medium'19864,579,480'Remotely controllable handling device for submerged structures, particularly for connecting underwater pipes'19864,533,526'Process for recovering polymetal compounds discharged from a submarine hydrothermal source and devices for carrying out the same'19854,468,155'Method and device for placing in a determined relative position two elements submerged in a conducting liquid medium'1984Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1984–1996Patents assigned to INST FRANCAIS DU PETROLE (10)· patent assignee history
1984–1999Based in Courbevoie, FR· patent location history
1986Patents assigned to COFLEXIP (1)· patent assignee history
1986Based in Paris, FR· patent location history
1999Patents assigned to INSITUTE FRANCAIS DU PETROLE (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| INST FRANCAIS DU PETROLE | 10 | 1984–1996 |
| COFLEXIP | 1 | 1986 |
| INSITUTE FRANCAIS DU PETROLE | 1 | 1999 |
Locations
| Location | Patents | Span |
|---|---|---|
| Courbevoie, FR | 11 | 1984–1999 |
| Paris, FR | 1 | 1986 |