Part-I - Controller General of Patents Designs and Trademarks

(12) PATENT APPLICATION PUBLICATION (21) Application No.3022/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 RESIDENCE TIME CHAMBER
(51) International classification
(31) Priority Document No :NA
(32) Priority Date :NA
(33) Name of priority country :NA
:C02F1/50;
C02F1/68;
B01F15/04
(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)DAVID CHANDRA FRANKLIN
2)RAJANARAYANA VENKATARAGHAVAN
(57) Abstract :
The present invention relates to a residence time chamber (8). In particular the invention relates to a residence time chamber (8)
for improving the action of the biocide in water purification. It is another aspect of the present invention to incorporate the
residence time chamber (8) in water purification devices, particularly to gravity-fed water purification devices that operate without
electricity and pressurised water, but the invention may also be applicable to devices using electricity and pressurized water. It has
been found that a residence time chamber having a simple actuator device consisting of a fill cup (5) connected to a plunger and a
resilience mechanism (7) provides a mechanical technique to automatically operate the controlled flow of fluid to give sufficient
residence time for the action of biocide.
No. of Pages : 22 No. of Claims : 10
The Patent Office Journal 21/06/2013 13518