Inventor
Johan Landfors
Inventor
Sundsvall, SE
Overview
Patents· 11 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C02Fprimary
C02FTreatment of water, waste water, sewage, or sludge25%
C01BNon-metallic elements21%
D21CProduction of cellulose by removing non-cellulose substances from cellulose-containing materials21%
B01DSeparation17%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests13%
C01DCompounds of alkali metals, i.e. lithium, sodium, potassium, rubidium, caesium, or francium4%
PatentTitleYear
6,576,213'Method of producing chlorine dioxide'20035,961,803'Leaching process'19995,792,315'Purifying aqueous effluent from a pulp mill using electro chemical membrane device'19985,653,861'Electrochemical process'19975,624,545'Production of polysulphide by electrolysis of white liquor containing sulphide'19975,547,542'Process for purification and recycle of solutions'19965,523,072'Process of producing chlorine dioxide'19965,487,881'Process of producing chlorine dioxide'19965,478,446'Electrochemical process'19955,437,791'Method for purifying process water from pulp manufacture'19955,407,547'Process for production of acidified process streams'1995Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1995–1997Patents assigned to EKA NOBEL AB (4)· patent assignee history
1995–1997Patents assigned to EKA NOBEL INC (4)· patent assignee history
1995–2003Based in Sundsvall, SE· patent location history
1998–1999Patents assigned to EKA CHEMICALS AB (2)· patent assignee history
1999Based in Ljungaverk, SE· patent location history
2003Patents assigned to EKA CHEMICALS INC (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| EKA NOBEL AB | 4 | 1995–1997 |
| EKA NOBEL INC | 4 | 1995–1997 |
| EKA CHEMICALS AB | 2 | 1998–1999 |
| EKA CHEMICALS INC | 1 | 2003 |
Locations
| Location | Patents | Span |
|---|---|---|
| Sundsvall, SE | 10 | 1995–2003 |
| Ljungaverk, SE | 1 | 1999 |