Hobe Schroeder
23Patents
10h-index
14Co-inventors
68Inventor score
Filing activity: Apr 24, 1978 → Jun 17, 1993
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4215051A | Formation, purification and recovery of phthalic anhydride | Chemistry; Metallurgy | 250 | Expired |
| US4833269A | Method for purifying terephthalic acid recycle streams | Chemistry; Metallurgy | 49 | Expired |
| US4892972A | Purification of crude terephthalic acid | Chemistry; Metallurgy | 47 | Expired |
| US4743577A | Catalyst composition | Chemistry; Metallurgy | 32 | Expired |
| US5354898A | Method for purifying crude aromatic carboxylic acids | Chemistry; Metallurgy | 25 | Expired |
| US5362908A | Catalyst and method for purifying crude terephthalic acid, isophthalic acid or naphthalene dicarboxylic acid | Chemistry; Metallurgy | 25 | Expired |
| US4933491A | Method for purifying a crude naphthalene dicarboxylic acid | Chemistry; Metallurgy | 23 | Expired |
| US4629715A | Purification of terephthalic acid to relatively low levels of 4-carboxybenzaldehyde and catalyst therefor | Chemistry; Metallurgy | 21 | Expired |
| US4165324A | Removal of phthalide from impure phthalic anhydride | Chemistry; Metallurgy | 15 | Expired |
| US4933492A | Purification of crude isophthalic acid | Chemistry; Metallurgy | 12 | Expired |
| US4728630A | Rhodium on carbon catalyst | Performing Operations; Transporting | 10 | Expired |
| US4215053A | Production of ortho-phthalic acid and its conversion and recovery of phthalic anhydride | Chemistry; Metallurgy | 10 | Expired |
| US4808751A | Method for reactivating a group VIII noble metal catalyst for use in the purification of crude terephthalic acid | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4937378A | Purification of crude isophthalic acid | Chemistry; Metallurgy | 8 | Expired |
| US4234494A | Formation, purification and recovery of phthalic anhydride | Chemistry; Metallurgy | 7 | Expired |
| US4215056A | Formation, purification and recovery of phthalic anhydride | Chemistry; Metallurgy | 7 | Expired |
| US4215055A | Production of liquid ortho-phthalic acid and its conversion to high _purity phthalic anhdyride | Chemistry; Metallurgy | 7 | Expired |
| US4215052A | Production of liquid ortho-phthalic acid and its conversion to high purity phthalic anhydride | Chemistry; Metallurgy | 6 | Expired |
| US4260546A | Aged molten color of maleic anhydride | Chemistry; Metallurgy | 6 | Expired |
| US4233227A | Phthalic anhydride formation and separation | Chemistry; Metallurgy | 5 | Expired |
| US4215054A | Production of liquid ortho-phthalic acid and its conversion to high purity phthalic anhydride | Chemistry; Metallurgy | 5 | Expired |
| US4220596A | Separation of phthalic anhydride from vapor mixture also containing water vapor | Chemistry; Metallurgy | 0 | Expired |
| US4197247A | Removal of bromine from phthalic anhydride | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.