Lummus Crest Inc.
37Patents
0Active
37Granted
37Portfolio score
Filing activity: Mar 5, 1981 → Nov 9, 1990
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4684456A | Control of bed expansion in expanded bed reactor | Emerging Cross-Sectional Technologies | 62 | Expired |
| US5003119A | Manufacture of alkylbenzenes | Chemistry; Metallurgy | 46 | Expired |
| US5190634A | Inhibition of coke formation during vaporization of heavy hydrocarbons | Chemistry; Metallurgy | 46 | Expired |
| US5082481A | Membrane separation process for cracked gases | Emerging Cross-Sectional Technologies | 35 | Expired |
| US4547284A | Coke production | Chemistry; Metallurgy | 33 | Expired |
| US4707245A | Temperature control for hydrogenation reactions | Emerging Cross-Sectional Technologies | 32 | Expired |
| US4561965A | Heat and water recovery from aqueous waste streams | Chemistry; Metallurgy | 31 | Expired |
| US4457834A | Recovery of hydrogen | Chemistry; Metallurgy | 26 | Expired |
| US4973780A | Alkylation of benzene in a moving bed | Emerging Cross-Sectional Technologies | 22 | Expired |
| US4628136A | Dehydrogenation process for production of styrene from ethylbenzene comprising low temperature heat recovery and modification of the ethylbenzene-steam feed therewith | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4744887A | Solid addition and withdrawal | Chemistry; Metallurgy | 19 | Expired |
| US4875995A | Solid addition and withdrawal | Chemistry; Metallurgy | 18 | Expired |
| US4846958A | High severity visbreaking with recycle | Chemistry; Metallurgy | 17 | Expired |
| US4773986A | High severity visbreaking | Chemistry; Metallurgy | 15 | Expired |
| US4592831A | Solvent for refining of residues | Chemistry; Metallurgy | 15 | Expired |
| US4496753A | Saponification of chlorohydrins | Chemistry; Metallurgy | 13 | Expired |
| US4767521A | Treatment of feed for high severity visbreaking | Chemistry; Metallurgy | 12 | Expired |
| US4940687A | Catalyst and process for hydrogenation of unsaturated hydrocarbons | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4634796A | Production of high purity phenol | Chemistry; Metallurgy | 12 | Expired |
| US4522157A | Convection section assembly for process heaters | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US4925638A | Thermowell assembly for a vessel | Physics | 9 | Expired |
| US4750554A | Internal tube sheet sealing apparatus assembly for tubular heat exchangers | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US4594433A | Production of maleic anhydride | Performing Operations; Transporting | 7 | Expired |
| US4795551A | Solvent refining of residues | Chemistry; Metallurgy | 7 | Expired |
| US4983272A | Process for delayed coking of coking feedstocks | Chemistry; Metallurgy | 7 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.