Prototech Company
24Patents
0Active
24Granted
33Portfolio score
Filing activity: Sep 7, 1973 → Jun 24, 1996
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4044193A | Finely particulated colloidal platinum compound and sol for producing the same, and method of preparation of fuel cell electrodes and the like employing the same | Emerging Cross-Sectional Technologies | 55 | Expired |
| US4331520A | Process for the recovery of hydrogen-reduced metals, ions and the like at porous hydrophobic catalytic barriers | Emerging Cross-Sectional Technologies | 51 | Expired |
| US4293396A | Thin carbon-cloth-based electrocatalytic gas diffusion electrodes, and electrochemical cells comprising the same | Emerging Cross-Sectional Technologies | 45 | Expired |
| US4422911A | Method of recovering hydrogen-reduced metals, ions and the like at porous catalytic barriers and apparatus therefor | Emerging Cross-Sectional Technologies | 41 | Expired |
| US4647359A | Electrocatalytic gas diffusion electrode employing thin carbon cloth layer | Emerging Cross-Sectional Technologies | 38 | Expired |
| US4900712A | Catalytic washcoat and method of preparation of the same | Performing Operations; Transporting | 30 | Expired |
| US4166143A | Control of the interaction of novel platinum-on-carbon electrocatalysts with fluorinated hydrocarbon resins in the preparation of fuel cell electrodes | Emerging Cross-Sectional Technologies | 27 | Expired |
| US4248682A | Carbon-cloth-based electrocatalytic gas diffusion electrodes, assembly and electrochemical cells comprising the same | Emerging Cross-Sectional Technologies | 26 | Expired |
| US4399185A | Low pressure-drop catalytic mat and method of preparing the same | Emerging Cross-Sectional Technologies | 26 | Expired |
| US4614575A | Polymeric hydrogel-containing gas diffusion electrodes and methods of using the same in electrochemical systems | Emerging Cross-Sectional Technologies | 26 | Expired |
| US3992331A | Catalytic platinum metal particles on a substrate and method of preparing the catalyst | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4102819A | Finely particulated colloidal platinum, compound and sol for producing the same, and method of preparation | Emerging Cross-Sectional Technologies | 20 | Expired |
| USRE33149E | Finely particulated colloidal platinum compound and sol for producing the same and method of preparation of fuel cell electrodes and the like employing the same | General | 16 | Expired |
| US3992512A | Finely particulated colloidal platinum compound and sol for producing the same, and method of preparation | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4082699A | Method of preparing catalytic structures from colloidal platinum compounds and such catalytic structures | Performing Operations; Transporting | 14 | Expired |
| US5431887A | Flame arresting and contaminant-adsorbing filter apparatus and method in the catalytic abatement of broiler emissions | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5693298A | Method for the catalytic abatement of broiler emissions | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4059541A | Platinum colloid sol and method of forming same | Emerging Cross-Sectional Technologies | 11 | Expired |
| US4478696A | Ionizable reducing and oxidizing gaseous supply means and process for catalytic barriers and electrodes | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5556819A | Method of making a flame arresting and contaminant-absorbing filter apparatus | Emerging Cross-Sectional Technologies | 8 | Expired |
| US3933684A | Method of forming palladium oxide and palladium particles | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4524094A | Self-supporting catalytic sleeve formed of interwoven loosely packed multi-fiber strands for receiving air-combustible gas mixtures for flameless catalytic combustion along the sleeve | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4412894A | Process for electrowinning of massive zinc with hydrogen anodes | Chemistry; Metallurgy | 2 | Expired |
| US4661425A | Lithium hydride anode for use in alkaline batteries | Emerging Cross-Sectional Technologies | 1 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.