Indian Patents. 209464:"A PROCESS FOR THE PURIFICATION OF SULFURIC ACID FOR SEMICONDUCTORS"

Title of Invention	"A PROCESS FOR THE PURIFICATION OF SULFURIC ACID FOR SEMICONDUCTORS"
Abstract	This invention relates to a process for the purification of sulfuric acid which comprises in the step of distillation of commercial grade sulfuric acid characterised in that is distillation under high vacuum and pressure of 0.001 mm Hg at a temperature of 200°-300°C.

Full Text

Patent Number

209464

Indian Patent Application Number

0965/DEL/1999

PG Journal Number

40/2007

Publication Date

05-Oct-2007

Grant Date

30-Aug-2007

Date of Filing

13-Jul-1999

Name of Patentee

THE SECRETARY, DEPARTMENT OF ELECTRONICS, GOVERNMENT OF INDIA,

Applicant Address

ELECTRONICS NIKETAN (GROUND FLOOR), 6, CGO COMPLEX, LODHI ROAD, NEW DELHI-110003.

#	Inventor's Name	Inventor's Address
1	URLAGADDALA RAMBABU	CENTRE FOR MATERIALS FOR ELECTRONICS TECHNOLOGY, DEPARTMENT OF ELECTRONICS, GOVERNMENT OF INDIA, PANCHAWATI, OFF PASHAN ROAD, PUNE-411 008, MAHARASHTRA.
2	RAWINDRA SHARWAN SONAWANE	CENTRE FOR MATERIALS FOR ELECTRONICS TECHNOLOGY, DEPARTMENT OF ELECTRONICS, GOVERNMENT OF INDIA, PANCHAWATI, OFF PASHAN ROAD, PUNE-411 008, MAHARASHTRA.
3	PAWAN KUMAR KHANNA	CENTRE FOR MATERIALS FOR ELECTRONICS TECHNOLOGY, DEPARTMENT OF ELECTRONICS, GOVERNMENT OF INDIA, PANCHAWATI, OFF PASHAN ROAD, PUNE-411 008, MAHARASHTRA.

PCT International Classification Number

C07C 29/136

PCT International Application Number

N/A

PCT International Filing date

#	PCT Application Number	Date of Convention	Priority Country
1			NA