Inventor
Torstein Obrestad
Inventor
Ulefoss, NO
Overview
Patents· 12 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C05Cprimary
C05CNitrogenous fertilisers22%
C05DInorganic fertilisers not covered by subclasses c05b, c05c13%
C05GMixtures of fertilisers covered individually by different subclasses of class c0513%
C01FCompounds of the metals beryllium, magnesium, aluminium, calcium, strontium, barium, radium, thorium, or of the rare-earth metals9%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry6%
C01BNon-metallic elements6%
C01PIndexing scheme relating to structural and physical aspects of solid inorganic compounds6%
C05BPhosphatic fertilisers6%
C09KMaterials for miscellaneous applications, not provided for elsewhere6%
C01CAmmonia3%
PatentTitleYear
10,294,170Conditioning agent for a particulate fertilizer for reducing hygroscopicity and dust formation201910,118,867Fertiliser coating containing micronutrients20189,994,492Fertiliser coating containing micronutrients20189,932,509Use of a calcium potassium nitrate salt for the manufacture of a heat transfer fluid20189,908,787'Method for producing anhydrous calcium nitrate powder'20187,500,995'Method for production of nitrate-containing products from undercooling melts'20096,610,267'Method for manufacturing a calcium nitrate melt and product thereof'20036,176,892'Method for making nitrogen-potassium fertilizer containing calcium nitrate and products thereof'20016,171,358'Calcium nitrate based fertilizer'20015,603,745'Agricultural composition and conditioning agent for reducing hygroscopicity and dust formation of fertilizers'19975,472,530'Method of manufacturing free-flowing ammonium nitrate particles applying an anticaking agent'19954,713,108'NPK complex fertilizer'1987Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1987–2003Patents assigned to NORSK HYDRO AS (6)· patent assignee history
1987–2019Based in Ulefoss, NO· patent location history
2009–2019Patents assigned to YARA INT ASA (4)· patent assignee history
2018Patents assigned to YARA UK LTD (2)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| NORSK HYDRO AS | 6 | 1987–2003 |
| YARA INT ASA | 4 | 2009–2019 |
| YARA UK LTD | 2 | 2018 |
Locations
| Location | Patents | Span |
|---|---|---|
| Ulefoss, NO | 12 | 1987–2019 |