Global Patent Index - EP 1490662 A1

EP 1490662 A1 2004-12-29 - LEAD IRON TUNGSTATE CAPACITIVE TRANSDUCER, RELAXOR MATERIAL THEREFOR, METHOD OF MANUFACTURE OF RELAXOR MATERIAL

Title (en)

LEAD IRON TUNGSTATE CAPACITIVE TRANSDUCER, RELAXOR MATERIAL THEREFOR, METHOD OF MANUFACTURE OF RELAXOR MATERIAL

Title (de)

KAPAZITIVER WANDLER AUS BLEI-EISEN-WOLFRAMAT, ZUGEHÖRIGES RELAXORMATERIAL SOWIE HERSTELLUNGSVERFAHREN FÜR RELAXORMATERIAL

Title (fr)

TRANSDUCTEUR CAPACITIF DE TUNGSTATE DE FER ET DE PLOMB, MATERIAU RELAXOR POUR CE DERNIER, PROCEDE DE FABRICATION DU MATERIAU RELAXOR

Publication

EP 1490662 A1 (EN)

Application

EP 02717027 A

Priority

IN 0200078 W

Abstract (en)

[origin: WO03083428A1] The present invention discloses a relaxor material lead iron tungstate which has been synthesized in doped and undoped conditions by single and two step heat treatment. The relaxor material is seen to exhibit almost negligible hysteresis and a transducer made thereby shows pressure measurement capability over a wide range from 0.5MPa to 415MPa with accuracy of +/- 0.05%.

IPC 1-7 (main, further and additional classification)

G01L 9/12; C04B 35/497

IPC 8 full level (invention and additional information)

G01L 9/12 (2006.01); C04B 35/00 (2006.01); C04B 35/497 (2006.01); G01L 9/00 (2006.01)

CPC (invention and additional information)

G01L 9/0075 (2013.01); C04B 35/495 (2013.01); C04B 35/497 (2013.01); C04B 2235/3258 (2013.01); C04B 2235/326 (2013.01); C04B 2235/3272 (2013.01); C04B 2235/3296 (2013.01); C04B 2235/72 (2013.01)

Citation (search report)

See references of WO 03083428A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

Designated extension state (EPC)

AL LT LV MK RO SI

EPO simple patent family

WO 03083428 A1 20031009; WO 03083428 A9 20110630; AU 2002247947 A1 20031013; AU 2002247947 A8 20110721; CA 2480285 A1 20031009; CA 2480285 C 20091013; CN 100538296 C 20090909; CN 1628243 A 20050615; EP 1490662 A1 20041229; IL 164145 A 20101130; IL 164145 D0 20051218; JP 2005521872 A 20050721; JP 4637485 B2 20110223

INPADOC legal status


2013-03-27 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20121002

2009-08-26 [RIN1] INVENTOR CHANGED BEFORE GRANT

- Inventor name: JAIN, KAMLESH KUMAR,NATIONAL PHYSICAL LABORATORY

2009-08-26 [RIN1] INVENTOR CHANGED BEFORE GRANT

- Inventor name: KUMAR, VINAY,NATIONAL PHYSICAL LABORATORY

2009-08-26 [RIN1] INVENTOR CHANGED BEFORE GRANT

- Inventor name: KASHYAP, SUBHASH CHAND,INDIAN INSTITUTE OF TECH.

2007-06-20 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20070522

2004-12-29 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20040930

2004-12-29 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

2004-12-29 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Countries: AL LT LV MK RO SI