Indian Patents
Title of Invention

A PROCESS FOR THE PREPARATION OF WATER DISPERSABLE BENTONITE GRAFTED ACRYLIC` COPOLYMER
Abstract A process for the preparation of water dispersable bentonite grafted acrylic copolymer by heating an aqueous dispersion of bentonite to a temperature in the range of 55°-95°C, copolymerising an acid acrylic monomer in the Bentonite dispersion medium in presence of a free radical initiator over a period of 3.5 to 7.5 hours, cooling the resultant graft polymer to a temperature in the range of 25° - 35°C to obtain acrylic copolymer, adjusting the pH of the end product adding sodium hydroxide, ammonia hydroxide or trichanolamine to the end product in the range of 4.5 - 5.5.
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Documents:

2136-del-1997-abstract.pdf

2136-del-1997-claims.pdf

2136-del-1997-complete specification (granted).pdf

2136-del-1997-correspondence-others.pdf

2136-del-1997-correspondence-po.pdf

2136-del-1997-description (complete).pdf

2136-del-1997-form-1.pdf

2136-del-1997-form-19.pdf

2136-del-1997-form-2.pdf


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Patent Number 214813
Indian Patent Application Number 2136/DEL/1997
PG Journal Number 09/2008
Publication Date 29-Feb-2008
Grant Date 15-Feb-2008
Date of Filing 31-Jul-1997
Name of Patentee COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH
Applicant Address RAFI MARG, NEW DELHI-110001, INDIA.
Inventors:
# Inventor's Name Inventor's Address
1 YALAVARTHI LAKSHMINARAYANA CENTRAL LEATHER RESEARCH INSTITUTE, ADYAR, CHENNAI-600020, INDIA.
2 THIRUMALACHARI RAMASAMI CENTRAL LEATHER RESEARCH INSTITUTE, ADYAR, CHENNAI-600020, INDIA.
3 GANGA RADHAKRISHNAN CENTRAL LEATHER RESEARCH INSTITUTE, ADYAR, CHENNAI-600020, INDIA.
4 KORITALA PANDURANGA RAO CENTRAL LEATHER RESEARCH INSTITUTE, ADYAR, CHENNAI-600020, INDIA.
5 SAMAYAVARAM RAMALINGAM CENTRAL LEATHER RESEARCH INSTITUTE, ADYAR, CHENNAI-600020, INDIA.
6 KARIKASSERY ANTONY RAPHEL CENTRAL LEATHER RESEARCH INSTITUTE, ADYAR, CHENNAI-600020, INDIA.
7 KRISHNASWAMI PARTHASARATHI CENTRAL LEATHER RESEARCH INSTITUTE, ADYAR, CHENNAI-600020, INDIA.
8 KRISHNA BALLABH GUPTA CENTRAL LEATHER RESEARCH INSTITUTE, ADYAR, CHENNAI-600020, INDIA.
9 KONDAPURAM VIJAYA RAGHAVAN CENTRAL LEATHER RESEARCH INSTITUTE, ADYAR, CHENNAI-600020, INDIA.
PCT International Classification Number C09K 3/10
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 NA