Part-I - Controller General of Patents Designs and Trademarks

(12) PATENT APPLICATION PUBLICATION (21) Application No.3023/MUM/2010 A
(19) INDIA
(22) Date of filing of Application :01/11/2010 (43) Publication Date : 21/06/2013
(54) Title of the invention : A FILTER BLOCK CUM SEDIMENT FILTER
(51) International classification
(31) Priority Document No :NA
(32) Priority Date :NA
(33) Name of priority country :NA
(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
:B01D39/20;
B01J20/20
(71)Name of Applicant :
1)HINDUSTAN UNILEVER LIMITED
Address of Applicant :165/166 BACKBAY
RECLAMATION, MUMBAI-400020, MAHARASHTRA,
INDIA.
(72)Name of Inventor :
1)CHATTERJEE JAIDEEP
2)GUPTA SANTOSH KUMAR
3)RAMACHANDRA RAJEESH KUMAR
(57) Abstract :
The present invention relates to a process for making a filter block cum sediment filter, suitable for use in gravity-fed filtration
units, which provides for filtering particulate contaminants and also have relatively high flow rates and life. According to another
aspect, the present invention relates to filter blocks cum sediment filter obtained by such process. It is an object of present
invention to provide a bound filter block with a sediment filter integrally fitted on its outer surface for use in gravity-fed filtration
units. It has been found that when a hemispherical carbon filter block having a sediment filter integrally fitted to its external
surface is used for removal of particulate contaminants in the gravity fed-filtration devices, it provides relatively high flow rates
and enhanced life.
No. of Pages : 22 No. of Claims : 6
The Patent Office Journal 21/06/2013 13519