Marshall D. Bishop
20Patents
8h-index
19Co-inventors
72Inventor score
Filing activity: Aug 18, 1986 → Mar 18, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5925182A | Stable liquid suspension compositions | Chemistry; Metallurgy | 36 | Expired |
| US5834533A | Stable liquid suspension compositions | Chemistry; Metallurgy | 33 | Expired |
| US5091448A | Suspending medium for water soluble polymer | Chemistry; Metallurgy | 24 | Expired |
| US4735659A | Compositions and a process for preparing water dispersible polymers | Chemistry; Metallurgy | 18 | Expired |
| US5631313A | Suspending medium for particulate material | Chemistry; Metallurgy | 14 | Expired |
| US4726912A | Stable suspensions of carboxymethyl cellulose and their preparation | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6547710B1 | Sulfonated rubber compositions and processes therefor and therewith | Chemistry; Metallurgy | 9 | Expired |
| US5073253A | Froth level measurement | Physics | 8 | Expired |
| US5041599A | Catalytic synthesis of thionocarbamates from xanthates and amines | Chemistry; Metallurgy | 2 | Expired |
| US9328280B2 | Additives for oil-based drilling fluids | Emerging Cross-Sectional Technologies | 1 | Active |
| US11008497B2 | Sulfur-containing polyether surfactants for cement spacer fluids and other downhole applications | Chemistry; Metallurgy | 0 | Active |
| US5132008A | Preparation of bis(alkylthio) alkanes or bis(arylthio) alkanes and use thereof | Performing Operations; Transporting | 0 | Expired |
| US10787599B2 | Sulfur-containing polyether surfactants for cement spacer fluids and other downhole applications | Chemistry; Metallurgy | 0 | Active |
| US6159886A | Clay composition containing a tannin and a method for producing bricks therefrom | Chemistry; Metallurgy | 0 | Expired |
| US12049585B2 | Wellbore drilling compositions | Chemistry; Metallurgy | 0 | Active |
| US11834594B2 | Methods for drilling wellbores using thinner compositions | Chemistry; Metallurgy | 0 | Active |
| US11078395B2 | Wellbore drilling compositions | Chemistry; Metallurgy | 0 | Active |
| US11098230B2 | Methods for drilling wellbores using thinner compositions | Chemistry; Metallurgy | 0 | Active |
| US11814569B2 | Drilling fluid lubricants | Chemistry; Metallurgy | 0 | Active |
| US8759260B2 | Wellbore fluid additives and methods of producing the same | Chemistry; Metallurgy | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.