Patents by Inventor SUBHASRI CHATTERJEE

SUBHASRI CHATTERJEE has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20260134174
    Abstract: The embodiments of the present disclosure herein address unresolved problems of unavailability of a scalable framework to enable large spectrum of optical response-design combination with reduced computing time. Further, there are limitations in the choice of features to obtain the desired sensitivity. Embodiments herein provide a method and system for a generative artificial intelligence (GenAI) based sensor design synthesis of metamaterial. Herein, the sensor design synthesis framework is based on deep generative models. The GenAI based design synthesis model would provide that unknown information that would immensely be useful for optimizing the design towards the highest sensitivity, addressing the limitations in the choice of features using numerical simulator and easiest fabrication-feasibility following sensitivity response (SenR). The SenR is the sensitivity relationship between the physical properties of the ambient medium and the property of the sensor.
    Type: Application
    Filed: September 23, 2025
    Publication date: May 14, 2026
    Applicant: Tata Consultancy Services Limited
    Inventors: Soma BANDYOPADHYAY, Subhasri CHATTERJEE, Anish DATTA, Tapas CHAKRAVARTY, Arpan PAL
  • Patent number: 12529650
    Abstract: The disclosure relates generally to methods and systems for monitoring lubricant oil condition using a photoacoustic modelling. Conventional techniques in the art for checking the condition of the lubricant oil is laboratory based and thus time consuming, error prone and not efficient. The present disclosure discloses a photoacoustic simulation model which is developed utilizing a photonic model such as a Monte Carlo method-based optical simulation integrated with a finite element model such as a k-wave toolbox-based acoustic measurement. The photoacoustic simulation model of the present disclosure is used to obtain a photoacoustic signal of the lubricant oil sample and a set of statistical features are determined from the obtained photoacoustic signal. The determined set of statistical features are then used as a training data to develop a machine learning (ML) model which is used to classify a type of contamination of the test lubricating oil.
    Type: Grant
    Filed: July 19, 2023
    Date of Patent: January 20, 2026
    Assignee: TATA CONSULTANCY SERVICES LIMITED
    Inventors: Subhasri Chatterjee, Abhijit Gorey, Arijit Sinharay, Chirabrata Bhaumik, Tapas Chakravarty, Supriya Gain, Arpan Pal
  • Patent number: 12429416
    Abstract: Existing Mueller Matrix polarization techniques that rely only on polarization properties are insufficient for accurate characterization of transparent objects. Embodiments of the present disclosure provide a method and system for Mueller Matrix polarimetric characterization of transparent object using optical properties along with the polarization properties to accurately characterize the transparent object. The polarization properties of are derived from a decomposed Mueller matrix element. Additionally, the method derives the optical properties by further subjecting the decomposed Mueller matrix element to Fresnel's law-based analysis and a reverse Monte Carlo analysis to extract optical properties such as a material refractive index and a material attenuation index. Optical properties vary with changes in the material property caused due to several factors such as manufacturing defect, aberration, inclusion of an impurity such as bubble or dust etc.
    Type: Grant
    Filed: December 15, 2022
    Date of Patent: September 30, 2025
    Assignee: TATA CONSULTANCY SERVICES LIMITED
    Inventors: Achanna Anil Kumar, Tapas Chakravarty, Subhasri Chatterjee, Arpan Pal, Jayavardhana Rama Gubbi Lakshminarasimha, Rokkam Krishna Kanth
  • Publication number: 20250292908
    Abstract: The disclosure relates generally to methods and systems for fluid retention analysis in Chronic Kidney Care. Conventional techniques for detecting the CKD in the subject lack with efficiency and accuracy since most of the ailments are silent and variant in nature pinpointing a universal cause or biomarker is difficult. The methods and systems of the present disclosure propose an in-silico model-based approach to detect CKD in the subject. In the first stage, a standard PPG waveform is simulated using the physics-based model. In the second stage, a Generative Adversarial Network (GAN) model is trained using the simulated PPG data and the reference experimental PPG data. In the third and the last stage, the discriminator model of the trained GAN model is employed to evaluate and analyze the test dataset of the subject whose CKD is to be detected.
    Type: Application
    Filed: March 17, 2025
    Publication date: September 18, 2025
    Applicant: Tata Consultancy Services Limited
    Inventors: Subhasri CHATTERJEE, Rajat Subhra PAL, Smita Elayath VASUDEVAN, Ninad Yeshwant RAJADHYAKSHA, Shashank KUMAR, Avik GHOSE
  • Publication number: 20240068934
    Abstract: The disclosure relates generally to methods and systems for monitoring lubricant oil condition using a photoacoustic modelling. Conventional techniques in the art for checking the condition of the lubricant oil is laboratory based and thus time consuming, error prone and not efficient. The present disclosure discloses a photoacoustic simulation model which is developed utilizing a photonic model such as a Monte Carlo method-based optical simulation integrated with a finite element model such as a k-wave toolbox-based acoustic measurement. The photoacoustic simulation model of the present disclosure is used to obtain a photoacoustic signal of the lubricant oil sample and a set of statistical features are determined from the obtained photoacoustic signal. The determined set of statistical features are then used as a training data to develop a machine learning (ML) model which is used to classify a type of contamination of the test lubricating oil.
    Type: Application
    Filed: July 19, 2023
    Publication date: February 29, 2024
    Applicant: Tata Consultancy Services Limited
    Inventors: Subhasri CHATTERJEE, Abhijit GOREY, Arijit SINHARAY, Chirabrata BHAUMIK, Tapas CHAKRAVARTY, Supriya GAIN, Arpan PAL
  • Publication number: 20230204494
    Abstract: Existing Mueller Matrix polarization techniques that rely only on polarization properties are insufficient for accurate characterization of transparent objects. Embodiments of the present disclosure provide a method and system for Mueller Matrix polarimetric characterization of transparent object using optical properties along with the polarization properties to accurately characterize the transparent object. The polarization properties of are derived from a decomposed Mueller matrix element. Additionally, the method derives the optical properties by further subjecting the decomposed Mueller matrix element to Fresnel’s law-based analysis and a reverse Monte Carlo analysis to extract optical properties such as a material refractive index and a material attenuation index. Optical properties vary with changes in the material property caused due to several factors such as manufacturing defect, aberration, inclusion of an impurity such as bubble or dust etc.
    Type: Application
    Filed: December 15, 2022
    Publication date: June 29, 2023
    Applicant: Tata Consultancy Services Limited
    Inventors: ACHANNA ANIL KUMAR, TAPAS CHAKRAVARTY, SUBHASRI CHATTERJEE, ARPAN PAL, JAYAVARDHANA RAMA GUBBI LAKSHMINARASIMHA, ROKKAM KRISHNA KANTH