Inventor
Bert Klesczewski
Inventor
Köln, DE
Overview
Patents· 15 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C08Gprimary
C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds48%
B01JChemical or physical processes, e.g. catalysis or colloid chemistry10%
C08JWorking-up10%
C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients6%
C07CAcyclic or carbocyclic compounds3%
C08LCompositions of macromolecular compounds3%
C09KMaterials for miscellaneous applications, not provided for elsewhere3%
E01BPermanent way3%
E01CConstruction of, or surfaces for, roads, sports grounds, or the like3%
E02BHydraulic engineering3%
PatentTitleYear
11,130,842Process for the preparation of polyether polyols202110,519,276Use of alcohols which contain at least two urethane groups for producing polyether carbonate polyols201910,487,175Use of alcohols containing at least two urethane groups for preparation of polyether polyols201910,233,298Polyurethane foams based on polyether carbonate polyols201910,106,641Mixtures of polyether carbonate polyols and polyether polyols for producing polyurethane soft foams20189,957,352Use of urethane alcohols for preparing polyether carbonate polyols20189,714,216'Use of urethane alcohols for preparation of polyether polyols'20179,328,196'Process for the preparation of polyricinoleic acid ester polyols having primary hydroxyl end groups'20169,193,822'Process for producing polyester polyols having secondary OH end groups'20159,139,685'Process for the preparation of a polyurethane polymer with secondary hydroxyl end groups comprising polyester polyols'20158,715,778'Ballast and process for the production of ballast'20148,183,302'Visco-elastic polyurethane foam with castor oil'20126,776,925'Process for the preparation of polyether polyols'20046,670,406'Process for producing polyether polyols'20036,444,720'Open-cell rigid polyurethane foams'2002Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2002–2004Patents assigned to BAYER AG (3)· patent assignee history
2002–2004Based in Dsseldorf, DE· patent location history
2012–2016Patents assigned to BAYER MATERIALSCIENCE AG (5)· patent assignee history
2012–2016Patents assigned to KLESCZEWSKI BERT (5)· patent assignee history
2012–2018Based in Köln, DE· patent location history
2015–2016Patents assigned to BAUER ERIKA (3)· patent assignee history
2017–2021Patents assigned to COVESTRO DEUTSCHLAND AG (7)· patent assignee history
2019Based in Koln, DE· patent location history
2021Based in Cologne, DE· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| COVESTRO DEUTSCHLAND AG | 7 | 2017–2021 |
| BAYER MATERIALSCIENCE AG | 5 | 2012–2016 |
| KLESCZEWSKI BERTself | 5 | 2012–2016 |
| BAUER ERIKA | 3 | 2015–2016 |
| BAYER AG | 3 | 2002–2004 |
Locations
| Location | Patents | Span |
|---|---|---|
| Köln, DE | 8 | 2012–2018 |
| Koln, DE | 3 | 2019 |
| Dsseldorf, DE | 3 | 2002–2004 |
| Cologne, DE | 1 | 2021 |