Visvanathan Ramanathan
25Patents
7h-index
25Co-inventors
65Inventor score
Filing activity: Jun 12, 1973 → Jun 24, 1991
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4084053A | Polycyclic compounds | Chemistry; Metallurgy | 51 | Expired |
| US4101541A | 3-Cyano-1,2,4-thiadiazolyl-5-czo dyestuffs | Chemistry; Metallurgy | 19 | Expired |
| US4068085A | 3-Nitro-5-azopyridine dyestuffs | Chemistry; Metallurgy | 17 | Expired |
| US4208324A | Disperse diaminopyridine-3-azo dyestuffs | Chemistry; Metallurgy | 14 | Expired |
| US4581445A | Cationic benzothiazole disazo compounds | Textiles; Paper | 10 | Expired |
| US3954398A | Polyester fibers dyed with a disazo disperse dyestuff | Chemistry; Metallurgy | 10 | Expired |
| US4033943A | Fiber reactive water soluble 2,4,6-triamino, 3-cyano pyridine-(5) azo dyestuffs | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4654384A | Basic water-soluble bis-(.beta.-azo-.alpha.-naphtholamino)-triazine compounds | Chemistry; Metallurgy | 6 | Expired |
| US4927865A | Anthraquinoylcarboxylic acid hydrazides, curable compositions and use thereof | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4855084A | Anthraquinoylcarboxylic acid hydrazides, curable compositions and use thereof | Emerging Cross-Sectional Technologies | 5 | Expired |
| US3964862A | Process for dyeing and printing textile materials of synthetic organic fibers | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4033716A | Transfer printing process for hydrophilic fibrous material | Textiles; Paper | 5 | Expired |
| US3966706A | 2,6-Dihydroxy-3-cyano-4-methylpyridine containing azo dyes which contain a functional amino group | Chemistry; Metallurgy | 5 | Expired |
| US3932122A | Azo compounds, their manufacture and use | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4115381A | Azo dyestuffs having a carboxyl group and an iminosulfonamido, iminosulfonylalkyl or iminosulfonylaryl group in the coupling component | Chemistry; Metallurgy | 4 | Expired |
| US4179435A | Azo dyestuffs having a carboxyl group and a substituted sulfonylimino group in the coupling component | Chemistry; Metallurgy | 3 | Expired |
| US4924015A | Substituted anthraquinones and use thereof in epoxy resins | Electricity | 3 | Expired |
| US4091025A | Process for the manufacture of nitroaminopyridines | Chemistry; Metallurgy | 2 | Expired |
| US4083688A | Disazo pyrazolyl dyed polyester fibers | Chemistry; Metallurgy | 2 | Expired |
| US4517358A | Disazo bis-benzthiazolyl compounds | Textiles; Paper | 2 | Expired |
| US5196521A | Azo dyes prepared using 2-alkylamino-3-cyano-4,6-diaminopyridines as coupling components | Chemistry; Metallurgy | 2 | Expired |
| US4116965A | Styryl dyestuffs containing certain amino, cyanopyridine moieties | Chemistry; Metallurgy | 1 | Expired |
| US4562247A | Disazo compounds containing a 6-acetoacetamide-1-naphthol-3-sulfonic derivative as coupling component | Chemistry; Metallurgy | 1 | Expired |
| US3971740A | Monoazo compounds | Emerging Cross-Sectional Technologies | 1 | Expired |
| US3945991A | Heterocyclic azo compounds containing a quaternated hydrazide group | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.