Process for removing nonmetallic impurities from metallurgical silicon

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9327987
SERIAL NO

13057084

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

The invention describes a process for removing nonmetallic impurities from metallurgical silicon. A melt is produced from metallurgical silicon and halide-containing silicon. As a result, the impurities are sublimed out and removed from the melt in the form of nonmetal halides. Compared with the known process, in which gaseous halogen is blown through an Si melt, the novel process can be carried out in a particularly simple and efficient manner.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
NAGARJUNA FERTILIZERS AND CHEMICALS LIMITEDHYDERABAD 500082

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bauch, Christian Bitterfeld-Wolfen, DE 32 65
Deltschew, Rumen Leipzig, DE 26 60
Gebel, Thoralf Dresden, DE 11 7
Heuer, Matthias Berlin, DE 19 84
Kirscht, Fritz Berlin, DE 17 90
Lippold, Gerd Leipzig, DE 21 55
Mohsseni-Ala, Seyed-Javad Bitterfeld-Wolfen, DE 5 16
Ounadjela, Kamel Belamont, US 36 496

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
11.5 Year Payment $7400.00 $3700.00 $1850.00 Nov 3, 2027
Fee Large entity fee small entity fee micro entity fee
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00