Prototech Company
Needham, MA, US· latest recorded location
Prototech Company is named on 24 US grants and 0 published applications in this corpus. Its most frequent classification is H01M (Batteries and fuel cells).
- Granted patents
- 24
- Published applications
- 0
- Inventors
- 8
- Granted in 2026 so far
- 0
- Most recent grant
- 2 Dec 1997
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
By publication year.
Technology areas
Share of 24 documents
- H01MBatteries and fuel cells13
- Y02EClean energy generation and storage12
- B01JChemical or physical processes10
- C25BElectrolytic or electrophoretic processes for the production of compounds or non-metals6
- Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests5
- C25CProcesses for the electrolytic production, recovery or refining of metals4
- Y10TTechnical subjects covered by former us classification4
- C01GCompounds containing metals not covered by subclasses c01d or c01f3
- F24CDomestic stoves or ranges3
- Y02PLow-carbon manufacturing3
Recent patents
- Method for the catalytic abatement of broiler emissions2 Dec 1997US 5,693,298 A
- Method of making a flame arresting and contaminant-absorbing filter apparatus17 Sep 1996US 5,556,819 A
- Flame arresting and contaminant-adsorbing filter apparatus and method in the catalytic abatement of broiler emissions11 Jul 1995US 5,431,887 A
- Catalytic washcoat and method of preparation of the same13 Feb 1990US 4,900,712 A
- Finely particulated colloidal platinum compound and sol for producing the same and method of preparation of fuel cell electrodes and the like employing the same16 Jan 1990US RE33,149 E
No published applications.
Most cited
By later US patents
- Finely particulated colloidal platinum compound and sol for producing the same, and method of preparation of fuel cell electrodes and the like employing the same55US 4,044,193 A1977
- Process for the recovery of hydrogen-reduced metals, ions and the like at porous hydrophobic catalytic barriers51US 4,331,520 A1982
- Thin carbon-cloth-based electrocatalytic gas diffusion electrodes, and electrochemical cells comprising the same44US 4,293,396 A1981
- Method of recovering hydrogen-reduced metals, ions and the like at porous catalytic barriers and apparatus therefor41US 4,422,911 A1983
- Electrocatalytic gas diffusion electrode employing thin carbon cloth layer38US 4,647,359 A1987