Assignee
HELIOTRONIC GMBH
DE·21 granted patents·550 citations·filing 1980–1990
Top patents by PatentIndex Score
21 records- 0197US4312850ASemicontinuous process for the manufacture of pure siliconHELIOTRONIC GMBH·Filed 1980·Granted Jan 26, 1982·102 cites·8 claims
- 0290US4447289AProcess for the manufacture of coarsely crystalline to monocrystalline sheets of semiconductor materialHELIOTRONIC GMBH·Filed 1982·Granted May 8, 1984·52 cites·6 claims
- 0388US4428783AProcess for the manufacture of vertical P-N junctions in the pulling of silicon from a silicon meltHELIOTRONIC GMBH·Filed 1981·Granted Jan 31, 1984·48 cites·7 claims
- 0487US4871117ALow-contamination method for comminuting solid silicon fragmentsHELIOTRONIC GMBH·Filed 1989·Granted Oct 3, 1989·48 cites·10 claims
- 0581US4366024AProcess for making solar cell base materialHELIOTRONIC GMBH·Filed 1980·Granted Dec 28, 1982·27 cites·12 claims
- 0680US4312700AMethod for making silicon rodsHELIOTRONIC GMBH·Filed 1980·Granted Jan 26, 1982·40 cites·8 claims
- 0779US4457903ASemicontinuous process for the production of pure siliconHELIOTRONIC GMBH·Filed 1983·Granted Jul 3, 1984·26 cites·7 claims
- 0877US4759887AApparatus and process for the manufacture of shaped bodies from silicon granulatesHELIOTRONIC GMBH·Filed 1986·Granted Jul 26, 1988·36 cites·13 claims
- 0975US4787986AProcess and apparatus for melting silicon powderHELIOTRONIC GMBH·Filed 1987·Granted Nov 29, 1988·24 cites·9 claims
- 1073US4461671AProcess for the manufacture of semiconductor wafersHELIOTRONIC GMBH·Filed 1982·Granted Jul 24, 1984·18 cites·8 claims
- 1170US5093289ACeramic material permitting the passage of fluids and based on silicon powder reaction-bonded in the presence of carbonHELIOTRONIC GMBH·Filed 1989·Granted Mar 3, 1992·28 cites·11 claims
- 1269US4515600AProcess for the removal of the slag portion from molten mixtures of slag and silicon using a semipermeable separating wallHELIOTRONIC GMBH·Filed 1983·Granted May 7, 1985·11 cites·5 claims
- 1368US4769107AProcess and apparatus for the cyclical manufacture of silicon shaped articlesHELIOTRONIC GMBH·Filed 1985·Granted Sep 6, 1988·21 cites·5 claims
- 1468US4588571AProcess for the purification of silicon by the action of an acidHELIOTRONIC GMBH·Filed 1984·Granted May 13, 1986·31 cites·17 claims
- 1554US5164138AMaterial comprising silicon and process for its manufactureHELIOTRONIC GMBH·Filed 1990·Granted Nov 17, 1992·16 cites·30 claims
- 1648US4767585AProcess for producing molded bodies from granular material of silicon, germanium or mixed crystals of these elementsHELIOTRONIC GMBH·Filed 1987·Granted Aug 30, 1988·9 cites·10 claims
- 1737US4308245AMethod of purifying metallurgical-grade siliconHELIOTRONIC GMBH·Filed 1980·Granted Dec 29, 1981·3 cites·7 claims
- 1835US4755340AMethod for producing packs of blades used for cutting crystal bars into wafersHELIOTRONIC GMBH·Filed 1987·Granted Jul 5, 1988·6 cites·2 claims
- 1927US4777926ADevice for clamping the blades in a gang saw for sawing crystal rodsHELIOTRONIC GMBH·Filed 1983·Granted Oct 18, 1988·0 cites·4 claims
- 2025US4733649AProcess and apparatus for multiple lap cutting of solid materialsHELIOTRONIC GMBH·Filed 1985·Granted Mar 29, 1988·3 cites·8 claims
- 2122US4539972AMethod for the multiple lap-cutting of crystal blocks with continuous shortening of the blade excursionHELIOTRONIC GMBH·Filed 1983·Granted Sep 10, 1985·1 cites·6 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →