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  Digital Catalogue for Technology and Products Development

   Technology and Product Development

    Basic Information

Technology developed: Polymer tubes for manufacturing stents (TP19769148545)
Category: Nil
Details of Inventor(s):
Inventor Institution/Organization/Company Department Designation
DR. NARESH BHATNAGAR Indian Institute of Technology, Delhi Mechanical Engineering Professor
Technical Application Area: Healthcare
If 'Other', please specify:
Please give more details of new technical application area:
Indian Institute of Technology (IIT) Delhi
Affiliated Ministry: Institution Funding (Self Supported)
Type of technology development: Indigenous
Does the technology help in replacing any import items currently
procured from outside India?
Does the technology have export potential? Yes
Category of Technology developed: Immediate Deployment
Stage of Development: Prototype Level
Please describe in detail including the TRL Level:


Applications: Stents are widely used medical devices that are implanted within ducts and blood vessels in a patient’s body to open and heal narrowed arteries and constrictive lumen. The tube-like structure of the bioresorbable polymeric stents referred to as a polymer tube is generally manufactured through an extrusion process. The polymer tube is extruded in such a manner that the polymer tube attains mechanical and physical properties, such as radial stiffness, to bear pressure and load when implanted within the patient’s body. The mechanical and physical properties of the polymer tube also depend upon the design and material of the polymer tube used during the extrusion process. In the present invention, the extrusion of polymer tubes whereby the polymer tubes are radially expanded and longitudinally expanded in one process step. The radial and longitudinal expansion in the same process step prevents the use of additional resources and devices. This technology has application in area of cardiology Key Features: There is no contamination of the polymer tubes in this technique. These have higher burst strength and elastic properties as compared to polymer tubes extruded through conventional techniques. The developed polymer tubes suitable for medical devices, such as vascular stent applications and peripheral nerve conduits.
Advantages: 1.It is a cost-efficient technique. 2.This technique reduces the wastage of expensive polymer material. 3.It gives short duration of post stenting 4.It helps in avoiding chronic inflammatory processes.

    Technology Inputs:

Imported Equipment/Spare Parts:
Equipment/Spare Parts Year ITC-HS Code
Indigenous Equipment/Spare Parts:
Equipment/Spare Parts Year ITC-HS Code
Imported Raw Materials:
Raw Materials Year ITC-HS Code
Indigenous Raw Materials:
Raw Materials Year ITC-HS Code
Existing R&D Facilities used:
Facilities Year ITC-HS Code

    R&D Investment:

R&D investment (Rs. in Lakhs):                    
Indian Source (Rs.) Foreign Source (Rs.) Year
0 0 NA

   Patents & Publications:

Filed Patents (No.) Granted Patents (No.) Year
1 0 NA
Submitted (No.) Published (No.) Year
0 0 NA

    Commercialization Potential:

Who are the Potential Licensees?
What commercially available products address
the same problem?
Company Product Problem Addressed
Would you like to develop this invention further with
corporate research support?
Would you be interested in participating in cluster based
programs for commercialization research or business
planning for your invention?
      Submitted by: Anil Wali Date of Submission: 5-8-2020

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