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October 04, 2021

Brightness conserved combiner and mode-field matched pump-signal combiner for high power fiber laser and amplifier

202111045353

Atasi Pal, Debparna Majumder, Ranjan Sen and Mrinmay Pal

India

January 15, 2019

Air Cooled Diode Pumped All-Fiber CW/QCW Thulium Laser For Operating Wavelength of 1.94 µm

201911001722

Atasi Pal, Debasis Pal, Sourav Das Chowdhury and Ranjan Sen

India

January 02, 2017

A Process of Producing Borosilicate
Glass with OH Content Less Than
70 ppm Using Microwave Heating

201711000056

A. K. Mandal and Ranjan Sen

India

December 08, 2016

A Method for Preparation of Glass Product Using Tannery Solid Waste

201611041924

A. K. Mandal, A. Halder, L. Ramrakhiani, S. Ghosh
and Ranjan Sen

INDIA

August 24, 2016

Method and Apparatus for the Generation of Gaussian Shaped Temporal Optical Pulses for Laser Based Material Processing

201611028763

Nishant Kumar Shekhar, Sourav Das Chowdhury, Mrinmay Pal and Ranjan Sen

India

March 16, 2016

June 06, 2021

A Process for Preparation of Iron-Doped
Alumino-Phosphate Glass Using Microwave Energy in Air Atmosphere
for Heat Absorbing Application

370058

A. K. Mandal and Ranjan Sen

India

December 30, 2015

Novel Soda Lime Silicate Glass Composition Comprising
Colemanite and a Process for the Preparation Thereof

IDPOOO065073

K. Annapurna, K. Biswas, A. D. Sontakke and Ranjan Sen

Indonesia

December 28, 2015

A Process for Fabrication of
Ytterbium (Yb) Doped Optical Fiber

2910731

Ranjan Sen and M. Saha

Canada

December 14, 2015

April 23, 2019

A Process for Fabrication of
Ytterbium (Yb) Doped Optical Fiber

ZL201480034004.X

Ranjan Sen and M. Saha

China

December 02, 2015

June 22, 2020

Novel Soda Lime Silicate Glass Composition Comprising
Colemanite and a Process for the Preparation Thereof

MY-175349-A

K. Annapurna, K. Biswas, A. D. Sontakke and Ranjan Sen

Malaysia

November 30, 2015

January 15, 2019

Novel Soda Lime Silicate Glass Composition Comprising
Colemanite and a Process for the Preparation Thereof

ZL201380077091.2

K. Annapurna, K. Biswas, A. D. Sontakke and Ranjan Sen

China

November 03, 2015

August 07, 2018

A Process for Fabrication of
Ytterbium (Yb) Doped Optical Fiber

10040714

Ranjan Sen and M. Saha

USA

November 03, 2015

March 07, 2018

A Process for Fabrication of
Ytterbium (Yb) Doped Optical Fiber

3001834

Ranjan Sen and M. Saha

Europe

October 30, 2015

August 31, 2018

A Process for Fabrication of
Ytterbium (Yb) Doped Optical Fiber

6393314

Ranjan Sen and M. Saha

Japan

September 17, 2015

February 19, 2019

Energy Efficient Soda Lime Silicate Glass Compositions Using Borax Pentahydrate

105050972

B. Karmakar, A. R. Molla, A. Tarafder and Ranjan Sen

China

August 18, 2015

April 19, 2021

Energy Efficient Soda Lime Silicate Glass Compositions Using Borax Pentahydrate

P00201505034

B. Karmakar, A. R. Molla, A. Tarafder and Ranjan Sen

Indonesia

January 15, 2014

March 10, 2021

Energy efficient silicate glass composition suitable for manufacturing improved container, float and ophthalmic glasses

EP2958866

B. Karmakar, A. R. Molla, A.Tarafder and Ranjan Sen

Europe

September 13, 2013

July 17, 2019

Novel Soda Lime Silicate Glass Composition Comprising
Colemanite and a Process for the Preparation Thereof

3004004

K. Annapurna, K. Biswas, A. D. Sontakke and Ranjan Sen

Europe

June 03, 2013

Soda Lime Silica Glass Compositions Using Colemanite and a Process for the Preparation Thereof

K. Annapurna, K. Biswas, A. D. Sontakke and Ranjan Sen

India

May 03, 2013

A Process for Fabrication of
Ytterbium (Yb) Doped Optical Fiber

1306DEL2013

Ranjan Sen and M. Saha

India

May 03, 2013

May 24, 2019

Novel Soda Lime Silicate Glass Composition Comprising
Colemanite and a Process for the Preparation Thereof

313125

K. Annapurna, K. Biswas, A. D. Sontakke and Ranjan Sen

India

February 19, 2013

September 26, 2018

Energy Efficient Silicate Glass Composition Suitable for
Manufacturing Improved Container, Float and Ophthalmic Glasses

301394

B. Karmakar, A. R. Molla, A. Tarafder and Ranjan Sen

India

September 28, 2012

A Process for the Preparation of Special Glass Beads for Vitrification of Nuclear Waste

3041DEL2012

Ranjan Sen, S. Mandal, A. Roy Chowdhury, M. K. S. R. Sonavane and P. Chaudhuri

India

April 25, 2012

February 11, 2014

An Improved Method for Fabricating Rare Earth Doped (RE) Optical Fiber Using a new Codopant

8649650

Ranjan Sen, A. Dhar, M. C. Paul and H. S. Maiti

USA

March 27, 2009

February 11, 2014

An Improved Method for Fabricating Rare Earth Doped (RE) Optical Fiber Using a Codopant

0609/DEL/2009

Ranjan Sen, A. Dhar M. C. Paul and H. S. Maiti

India

September 27, 2004

A Process of Making Rare Earth Doped Optical Fiber

Ranjan Sen, M. Chatterjee, M. K. Naskar, M. Pal, M. C. Paul,
S. K. Bhadra, K. Dasgupta,
D. Ganguli, T. Bandopadhyay and A. Gedanken

Canada

May 18, 2004

June 24, 2009

A Process of Making Rare Earth Doped Optical Fiber

01823802.5

Ranjan Sen, M. Chatterjee, M. K. Naskar, M. Pal, M. C. Paul, S. K. Bhadra,
K. Dasgupta, D. Ganguli, T. Bandopadhyay and A. Gedanken

China

May 17, 2004

July 27, 2005

A Process of Making Rare Earth Doped Optical Fiber

20043772

Ranjan Sen, M. Chatterjee, M. K. Naskar, M. Pal, M. C. Paul,
S. K. Bhadra, K. Dasgupta,
D Ganguli, T. Bandopadhyay and A. Gedanken

South
Africa

April 19, 2004

June 20, 2008

A Process of Making Rare Earth Doped Optical Fiber

4141956

Ranjan Sen, M. Chatterjee, M. K. Naskar, M. Pal, M. C. Paul, S. K. Bhadra,
K. Dasgupta, D. Ganguli, T. Bandopadhyay and A. Gedanken

Japan

April 17, 2004

March 17, 2008

A Process of Making Rare Earth Doped Optical Fiber

10-0816010

Ranjan Sen, M. Chatterjee, M. K. Naskar, M. Pal, M. C. Paul, S. K. Bhadra,
K. Dasgupta, D. Ganguli, T. Bandopadhyay and A. Gedanken.

Korea

November 6, 2003

A Process of Making Rare Earth Doped Optical Fiber

1839/DEL/03

Ranjan Sen, M. Chatterjee, M. K. Naskar, M. Pal, M. C. Paul, S. K. Bhadra,
K. Dasgupta, D. Ganguli, T. Bandopadhyay and A. Gedanken

India

September 09, 2003

September 13, 2006

Process for Making Rare Earth Doped Optical Fiber

ZL01823008.3

T. Bandopadhyay, Ranjan Sen, S. K. Bhadra, K. Dasgupta and M. C. Paul

China

August 06, 2003

May 18, 2005

Process for Making Rare Earth Doped Optical Fiber

GB2388367

T. Bandopadhyay, Ranjan Sen, S. K. Bhadra, K. Dasgupta and M. C. Paul

UK

August 05, 2003

August 23, 2007

Process for Making Rare Earth Doped Optical Fiber

2001242728

T. Bandopadhyay, Ranjan Sen, S. K. Bhadra, K. Dasgupta and M. C. Paul

Australia

August 04, 2003

September 29, 2006

Process for Making Rare Earth Doped Optical Fiber

2003/5990

T. Bandopadhyay, Ranjan Sen, S. K. Bhadra, K. Dasgupta and M. C. Paul

South
Africa

August 02, 2003

December 01, 2006

Process for Making Rare Earth Doped Optical Fiber

2003-7010252

T. Bandopadhyay, Ranjan Sen, S. K. Bhadra, K. Dasgupta and M. C. Paul

Korea

August 01, 2003

September 26, 2006

Process for Making Rare Earth Doped Optical Fiber

2436579

T. Bandopadhyay, Ranjan Sen, S. K. Bhadra, K. Dasgupta and M. C. Paul

Canada

March 31, 2003

September 13, 2008

Process for Making Rare Earth Doped Optical Fiber

223566

T. Bandopadhyay, Ranjan Sen, S. K. Bhadra, K. Dasgupta and M. C. Paul

India

March 28, 2003

November 14, 2007

A Process of Making Rare Earth Doped Optical Fiber

1487751

Ranjan Sen, M. Chatterjee, M. K. Naskar, M. Pal, M. C. Paul,
S. K. Bhadra, K. Dasgupta, D. Ganguli, T. Bandopadhyay
and A. Gedanken

Europe

March 28, 2002

January 31, 2008

Method of Fabricating Rare Earth Doped Optical Fiber

2002249558

Ranjan Sen, M. Pal, M. C. Paul, S. K. Bhadra, S. Chatterjee and K. Dasgupta

Australia

March 27, 2002

February 08, 2005

Method of Fabricating Rare Earth Doped Optical Fiber

10/106868

Ranjan Sen, M. Pal, M. C. Paul, S. K. Bhadra, S. Chatterjee and K. Dasgupta

USA

October 22, 2001

May 10, 2005

A Process of Making Rare Earth Doped Optical Fiber

6889528

Ranjan Sen, M. Chatterjee, M. K. Naskar, M. Pal, M. C. Paul, S. K. Bhadra,
K. Dasgupta, D. Ganguli, T. Bandopadhyay and A. Gedanken

USA

March 19, 2001

March 06, 2009

An Equipment for the Manufacture of Thin Multifilament Fused Quartz Fiber Strand and a Process Thereof

231611

S. K. Bhadra, S. Chakrabarti, T. K. Bandopadhyay, K. K. Phani, N. R. Bose, K. Dasgupta, Ranjan Sen, M. C. Paul, M. Pal, T. K. Gangopadhyay and P. P. Giri

India

March 07, 2001

June 22, 2004

Process for Making Rare Earth Doped Optical Fiber

6751990

T. Bandopadhyay, Ranjan Sen, S. K. Bhadra, K. Dasgupta and M. C. Paul

USA