Chem Systems, Inc.
21Patents
0Active
21Granted
31Portfolio score
Filing activity: Jul 17, 1975 → Dec 20, 1985
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4311851A | Preparation of carboxylic acid esters with BF.sub.3 -alcohol complex catalyst | Emerging Cross-Sectional Technologies | 31 | Expired |
| US4031123A | Methanol production in a paraffinic medium | Chemistry; Metallurgy | 30 | Expired |
| USRE31010E | Preparation of carboxylic acid esters with BF.sub.3 complex catalyst | General | 25 | Expired |
| US4256913A | Preparation of carboxylic acids using a BF.sub.3 catalyst complex | Chemistry; Metallurgy | 21 | Expired |
| US4477594A | Process for the synthesis of aliphatic alcohol-containing mixtures | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4567204A | Method for making methanol | Chemistry; Metallurgy | 13 | Expired |
| US4262138A | Preparation of carboxylic acid esters with BF.sub.3 complex catalyst | Chemistry; Metallurgy | 12 | Expired |
| US4087623A | Catalyst recovery process | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4585899A | Hydrogenation of carboxylic acid compounds to aldehydes using MnO.sub.2 on gamma alumina as catalyst | Performing Operations; Transporting | 7 | Expired |
| US4045477A | Acetoxylation process | Chemistry; Metallurgy | 6 | Expired |
| US4585900A | Hydrogenation of carboxylic acid compounds to aldehydes using Cu/YtO as catalyst | Performing Operations; Transporting | 6 | Expired |
| US4261899A | Phthalic anhydride reaction system | Performing Operations; Transporting | 6 | Expired |
| US4158100A | Process for the preparation of .beta.-phenylethyl alcohol via homologation | Chemistry; Metallurgy | 5 | Expired |
| US4012424A | Cracking of mixtures containing hydroxyesters | Chemistry; Metallurgy | 5 | Expired |
| US4325803A | Process for hydrogenation/extraction of organics contained in rock | Chemistry; Metallurgy | 4 | Expired |
| US4439309A | Two-stage hydrogen donor solvent cracking process | Chemistry; Metallurgy | 4 | Expired |
| USRE29597E | Process for the production of epoxides | General | 2 | Expired |
| US4639470A | Method for making methanol | Chemistry; Metallurgy | 2 | Expired |
| US4250344A | Cracking process for styrene | Chemistry; Metallurgy | 2 | Expired |
| US4012423A | Process for the production of epoxides | Chemistry; Metallurgy | 1 | Expired |
| US4399295A | Process for preparing oxirane compounds | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.