Northrop Grumman has patented a system for degaussing magnetized structures. The system uses alternating current to induce a decaying magnetic field, converting the structure into a degaussed state. Additionally, a direct current signal is used to induce an offset magnetic field for further degaussing. GlobalData’s report on Northrop Grumman gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Northrop Grumman, Superconducting quantum circuits was a key innovation area identified from patents. Northrop Grumman's grant share as of January 2024 was 66%. Grant share is based on the ratio of number of grants to total number of patents.

System for degaussing magnetized structures using alternating and direct currents

Source: United States Patent and Trademark Office (USPTO). Credit: Northrop Grumman Corp

A recently granted patent (Publication Number: US11887763B2) discloses a system for degaussing a magnetized structure. The system includes a first circuit that provides an alternating current (AC) signal to a first electrical coil, inducing a decaying magnetic field on the magnetized structure to convert it into a degaussed structure. Additionally, a second electrical coil positioned inside the magnetized structure receives a direct current (DC) signal to induce an offset magnetic field on the degaussed structure. The system further comprises a shielded gauss chamber to prevent stray magnetic fields from affecting the process.

Furthermore, the patent describes a method for degaussing a magnetized structure using the system. The method involves generating an AC signal that decays over time, inducing a decaying magnetic field on the magnetized structure. A second electrical coil then applies a nearly constant DC signal to create an offset magnetic field on the degaussed structure. The process aims to reduce the magnetic flux density of the degaussed structure to less than 10 nanoteslas, with a predetermined time frame of about 45 seconds or more for optimal results. The system and method outlined in the patent offer a comprehensive approach to effectively degauss magnetized structures, particularly useful for applications involving superconducting circuits housed in shielded gauss chambers.

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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.