Henry Ashjian
25Patents
10h-index
30Co-inventors
71Inventor score
Filing activity: Jan 14, 1980 → Apr 16, 1996
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4652387A | Borated reaction products of succinic compounds as lubricant dispersants and antioxidants | Chemistry; Metallurgy | 52 | Expired |
| US4971598A | Reaction products of alkenyl succinimides with ethylenediamine carboxy acids as fuel detergents | Mechanical Engineering; Lighting; Heating | 43 | Expired |
| US4328113A | Friction reducing additives and compositions thereof | Chemistry; Metallurgy | 41 | Expired |
| US5498596A | Non toxic, biodegradable well fluids | Emerging Cross-Sectional Technologies | 38 | Expired |
| US5457254A | Naphthalene alkylation process using mixed H/NH3 form catalyst | Chemistry; Metallurgy | 19 | Expired |
| US5034563A | Naphthalene alkylation process | Chemistry; Metallurgy | 18 | Expired |
| US5705086A | Refrigeration oils comprising esters of hindered alcohols | Chemistry; Metallurgy | 18 | Expired |
| US5691281A | Well fluids based on low viscosity synthetic hydrocarbons | Chemistry; Metallurgy | 15 | Expired |
| US5338468A | Sulfurized olefins | Chemistry; Metallurgy | 14 | Expired |
| US4522734A | Borated friction reducing additives and compositions thereof | Chemistry; Metallurgy | 12 | Expired |
| US4698169A | Reaction products of alkenylsuccinic compounds with aromatic amines and lubricant compositions thereof | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US5985804A | Bioresistant surfactants and cutting oil formulations | Chemistry; Metallurgy | 10 | Expired |
| US4803004A | Reaction products of alkenylsuccinic compounds with aromatic amines and hindered alcohols and lubricant compositions thereof | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US5334228A | Deposit control additives and fuel compositions containing the same | Chemistry; Metallurgy | 9 | Expired |
| US4895579A | Reaction products of alkenylsuccinic compounds with aromatic amines and hindered alcohols and lubricant and fuel compositions thereof | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US4522736A | Products of reaction involving alkenylsuccinic anhydrides with aminoalcohols and aromatic secondary amines and lubricants containing same | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US5510549A | Fiber optic cable and viscous filler material | Physics | 5 | Expired |
| US4985156A | Production of borated ashless dispersants | Chemistry; Metallurgy | 5 | Expired |
| US5384055A | Lubricant additives | Chemistry; Metallurgy | 4 | Expired |
| US4599183A | Multifunctional additives | Chemistry; Metallurgy | 3 | Expired |
| US5400427A | Fiber optic cable and viscous filler material | Physics | 3 | Expired |
| US4661271A | Friction reducing, antiwear additives | Chemistry; Metallurgy | 3 | Expired |
| US5629463A | Naphthalene alkylation with RE and mixed H/NH3 form catalyst | Chemistry; Metallurgy | 2 | Expired |
| US5252237A | Complex alkoxy borates of alkylated phenols as lubricant stabilizers | Chemistry; Metallurgy | 2 | Expired |
| US4617133A | Friction reducing, antiwear additives | Chemistry; Metallurgy | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.