Diamond Shamrock Chemicals Company
62Patents
0Active
62Granted
39Portfolio score
Filing activity: Dec 14, 1978 → Jun 14, 1993
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4534356A | Solid state transcutaneous blood gas sensors | Physics | 589 | Expired |
| US4674574A | Fluid loss agents for oil well cementing composition | Chemistry; Metallurgy | 79 | Expired |
| US4536274A | pH and CO.sub.2 sensing device and method of making the same | Physics | 69 | Expired |
| US4696981A | Method of manufacturing polyamino acid with microwaves | Emerging Cross-Sectional Technologies | 54 | Expired |
| US4500647A | Three layer laminated matrix electrode | Emerging Cross-Sectional Technologies | 53 | Expired |
| US4552670A | Amphoteric water-in-oil self-inverting polymer emulsion | Chemistry; Metallurgy | 51 | Expired |
| US4470859A | Coated porous substrate formation by solution coating | Emerging Cross-Sectional Technologies | 44 | Expired |
| US4505828A | Amphoteric water-in-oil self-inverting polymer emulsion | Emerging Cross-Sectional Technologies | 39 | Expired |
| US4605698A | Polyfunctional aziridines for use in crosslinking applications | Chemistry; Metallurgy | 39 | Expired |
| US4605773A | Low-foaming, pH sensitive, alkylamine polyether surface active agents and methods for using | Emerging Cross-Sectional Technologies | 34 | Expired |
| US4741843A | Fluid loss control additives and drilling fluids containing same | Chemistry; Metallurgy | 28 | Expired |
| US4643800A | Methods of decontaminating secondary fiber | Emerging Cross-Sectional Technologies | 26 | Expired |
| US4699225A | Drilling fluids containing AMPS, acrylic acid, itaconic acid polymer | Chemistry; Metallurgy | 21 | Expired |
| US4478602A | Carbonaceous oil slurries stabilized by binary surfactant mixtures | Emerging Cross-Sectional Technologies | 19 | Expired |
| US4474053A | Storage or disposal cavern leak detection and loss prevention | Fixed Constructions | 19 | Expired |
| US4605418A | Aftertreatment of dyed cellulosic materials | Textiles; Paper | 18 | Expired |
| US4599190A | Composition for drinking secondary fibers | Emerging Cross-Sectional Technologies | 17 | Expired |
| US4487815A | Temperature resistant coating composite | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4548720A | Removal of hydrogen sulfide from drilling fluids | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4431548A | Use of an amphoteric water-in-oil self-inverting polymer emulsion as a flocculant | Chemistry; Metallurgy | 16 | Expired |
| US4676836A | Anionic Lubricant dispersions useful in paper coatings | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4622373A | Fluid loss control additives from AMPS polymers | Chemistry; Metallurgy | 15 | Expired |
| US4810328A | Method of brown stock washing | Textiles; Paper | 13 | Expired |
| US4540716A | Method for making finely divided perfluorocarbon copolymer | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4505833A | Stabilizing clayey formations | Emerging Cross-Sectional Technologies | 12 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.