David E. Ripple
16Patents
10h-index
7Co-inventors
65Inventor score
Filing activity: May 10, 1976 → May 17, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4904401A | Lubricating oil compositions | Mechanical Engineering; Lighting; Heating | 72 | Expired |
| US4981602A | Lubricating oil compositions and concentrates | Mechanical Engineering; Lighting; Heating | 37 | Expired |
| US4957649A | Lubricating oil compositions and concentrates | Chemistry; Metallurgy | 36 | Expired |
| US4938881A | Lubricating oil compositions and concentrates | Chemistry; Metallurgy | 31 | Expired |
| US6596672B1 | Low ash lubricant compositions containing multiple overbased materials and multiple antioxidants | Chemistry; Metallurgy | 26 | Expired |
| US5328620A | Oil additive package useful in diesel engine and transmission lubricants | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US5202036A | Diesel lubricants and methods | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US5259967A | Low ash lubricant composition | Chemistry; Metallurgy | 12 | Expired |
| US4194886A | Haloalkyl hydroxy-aromatic condensation products as fuel additives | Chemistry; Metallurgy | 12 | Expired |
| US4081387A | Phosphorus-containing lubricating compositions | Chemistry; Metallurgy | 11 | Expired |
| US5674819A | Carboxylic compositions, derivatives,lubricants, fuels and concentrates | Chemistry; Metallurgy | 8 | Expired |
| US11019898B2 | Picnic food transportation assembly | Human Necessities | 2 | Active |
| US4186157A | Phosphorus-containing reaction mixture | Chemistry; Metallurgy | 2 | Expired |
| US4179449A | Haloalkyl hydroxy-aromatic condensation products as fuel and lubricant additives | Chemistry; Metallurgy | 0 | Expired |
| US4108783A | Haloalkyl hydroxy-aromatic condensation products as fuel and lubricant additives | Chemistry; Metallurgy | 0 | Expired |
| US4176077A | Haloalkyl hydroxy-aromatic condensation products as lubricant additives | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.