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Patent Information
Application Number
107/DEL/2001
Patent Number
218350
Invention Field
CHEMICAL
Publication Type
INA
Publication Number
22/2006
Status
Grant Date
Filing Date
Grant Date
2008-03-31
Renewal Date
2013-01-31
Abstract
Abstract: This invention relates to an improved process for the preparation of Naptha [1,8-cd] dithiole. The product is prepared from 1,8-diamino naphthalene in two simple organic transformations. In the process a diaminonaphthalene is treated with a diazotizing agent to obtain dihalo derivative of naphthalene which is farther treated with sulphur in presence of an aprotic solvent to get the product. The process has excellent yield and purity.The products rae pure do not need any further purification.
Applicants
1. COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH
RAFI MARG, NEW DELHI- 110 001, INDIA
Inventors
1. KUMAR VENKATARAMAN SRINIVASAN
NATIONAL CHEMICAL LABORATORY, PUNE-411 008, MAHARSHTRA, INDIA
2. THOMAS DANIEL
NATIONAL CHEMICAL LABORATORY, PUNE-411 008, MAHARSHTRA, INDIA
3. RAJGOPAL JAGANNATH LAHOTI
NATIONAL CHEMICAL LABORATORY, PUNE-411 008, MAHARSHTRA, INDIA
4. RAMAVARMA RAJGOPAL
NATIONAL CHEMICAL LABORATORY, PUNE-411 008, MAHARSHTRA, INDIA
Specification
1. KUMAR VENKATARAMAN SRINIVASAN
NATIONAL CHEMICAL LABORATORY, PUNE-411 008, MAHARSHTRA, INDIA
2. THOMAS DANIEL
NATIONAL CHEMICAL LABORATORY, PUNE-411 008, MAHARSHTRA, INDIA
3. RAJGOPAL JAGANNATH LAHOTI
NATIONAL CHEMICAL LABORATORY, PUNE-411 008, MAHARSHTRA, INDIA
4. RAMAVARMA RAJGOPAL
NATIONAL CHEMICAL LABORATORY, PUNE-411 008, MAHARSHTRA, INDIA
Eregister
| Year | CBR Date | CBR Number | Renwal Amount | Renwal Date | Normal Due Date | Renwal To | Renwal From | Due Date with Extension | Reneal Certificate Number |
|---|---|---|---|---|---|---|---|---|---|
| 3rd year | 14/07/2008 | 5483 | 2000 | 14/07/2008 | 02/08/2008 | 31/01/2004 | 31/01/2003 | 02/02/2009 | 4282 |
| 4th year | 14/07/2008 | 5483 | 2000 | 14/07/2008 | 02/08/2008 | 31/01/2005 | 31/01/2004 | 02/02/2009 | 4282 |
| 5th year | 14/07/2008 | 5483 | 2000 | 14/07/2008 | 02/08/2008 | 31/01/2006 | 31/01/2005 | 02/02/2009 | 4282 |
| 6th year | 14/07/2008 | 5483 | 2000 | 14/07/2008 | 02/08/2008 | 31/01/2007 | 31/01/2006 | 02/02/2009 | 4282 |
| 7th year | 14/07/2008 | 5483 | 6000 | 14/07/2008 | 02/08/2008 | 31/01/2008 | 31/01/2007 | 02/02/2009 | 4282 |
| 8th year | 14/07/2008 | 5483 | 6000 | 14/07/2008 | 02/08/2008 | 31/01/2009 | 31/01/2008 | 02/02/2009 | 4282 |
| 9th year | 22/12/2008 | 10057 | 6000 | 22/12/2008 | 31/01/2009 | 31/01/2010 | 31/01/2009 | 31/07/2009 | 7643 |
| 10th year | 30/12/2009 | 10907 | 6000 | 30/12/2009 | 31/01/2010 | 31/01/2011 | 31/01/2010 | 31/07/2010 | 9896 |
| 11th year | 07/01/2011 | 144 | 12000 | 07/01/2011 | 31/01/2011 | 31/01/2012 | 31/01/2011 | 31/07/2011 | 190 |
| 12th year | 03/01/2012 | 53 | 12000 | 03/01/2012 | 31/01/2012 | 31/01/2013 | 31/01/2012 | 31/07/2012 | 87 |
| 13th year | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 14th year | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 15th year | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 16th year | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 17th year | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 18th year | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 19th year | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| 20th year | -- | -- | -- | -- | -- | -- | -- | -- | -- |
Specification
Documents
Documents
| Name | Date | |
|---|---|---|
| 1 | 107-del-2001-abstract.pdf | 2011-08-21 |
| 2 | 107-del-2001-claims.pdf | 2011-08-21 |
| 3 | 107-del-2001-correspondence-others.pdf | 2011-08-21 |
| 4 | 107-del-2001-correspondence-po.pdf | 2011-08-21 |
| 5 | 107-del-2001-description (complete).pdf | 2011-08-21 |
| 6 | 107-del-2001-form-1.pdf | 2011-08-21 |
| 7 | 107-del-2001-form-19.pdf | 2011-08-21 |
| 8 | 107-del-2001-form-2.pdf | 2011-08-21 |
| 9 | 107-del-2001-form-3.pdf | 2011-08-21 |