Part-I - Controller General of Patents Designs and Trademarks

(12) PATENT APPLICATION PUBLICATION (21) Application No.2560/MUM/2010 A
(19) INDIA
(22) Date of filing of Application :16/09/2010 (43) Publication Date : 21/06/2013
(54) Title of the invention : AN ALUNIMA BLOCK FILTER MEDIA.
(51) International classification
(31) Priority Document No :NA
(32) Priority Date :NA
(33) Name of priority country :NA
:B01J20/08;
B01J20/28
(86) International Application No
:NA
Filing Date
:NA
(87) International Publication No : NA
(61) Patent of Addition to Application Number :NA
Filing Date
:NA
(62) Divisional to Application Number
:NA
Filing Date
:NA
(71)Name of Applicant :
1)HINDUSTAN UNILEVER LIMITED
Address of Applicant :165/166 BACKBAY
RECLAMATION, MUMBAI - 400020, MAHARASHTRA,
INDIA
(72)Name of Inventor :
1)ABDUL KAREEM SHAJAHAN
2)CHATTERJEE JAIDEEP
3)GUPTA SANTOSH KUMAR
4)PRATAP SHAILENDRA
5)RAMACHANDRA RAJEESH KUMAR
(57) Abstract :
The present invention relates to an activated alumina block filter media and a process for preparation of the alumina block, for use
in gravity fed water filters and pressurized water filters for efficiently filtering particulate contaminants including microorganisms
like cysts, bacteria and virus apart from removal of chemical contaminants while at the same time providing for relatively high
flow rates. The alumina block filter media for use in gravity fed water filters and pressurized water filters comprises (a) activated
alumina having a particle size in the range of 100 to 1000 microns and with a BET surface area in the range 200 to 1000 m2/g and
(b) a binder material having a Melt Flow Rate (MFR) of less than 5 Wherein the ratio of activated alumina particles to the binder
is in the range of 1:1 to 20:1 by weight.
No. of Pages : 20 No. of Claims : 13
The Patent Office Journal 21/06/2013 13604