Company Filing History:
3 out of 64 
2 out of 74 Years Active: 2019-2025
Title: Innovations by Johan Stephan in Electrical Conductivity and Fastener Technology
Introduction
Johan Stephan is an accomplished inventor based in Houilles, France, with a notable portfolio of four patents. His work primarily focuses on advancements in electrical conductivity and fastener technology, contributing significantly to the aerospace industry.
Latest Patents
One of Johan's latest patents is titled "Methods for coating and components having coatings for electrical conductivity." This invention describes a metal component made of a base metal with a coating system that includes a conductive layer and a resin-based layer containing conductive pigments. The conductive pigments create electrically conductive 3D-networks within the resin, which are randomly distributed. The method for coating involves depositing a conductive layer on the component's surface, followed by a resin application with conductive pigments, and then drying the resin. This innovative coating system is applicable to various metal components, including aerospace fasteners such as pins, bolts, collars, nuts, and washers, as well as helicopter rotors and landing gear structures.
Another significant patent is related to a "Fastener using lubricated interference fit." This invention outlines a method for installing a metallic fastener designed for the interference fit assembly of structural elements. The fastener features an enlarged head and a shaft with an external diameter greater than the internal diameter of the hole it fits into. The conductive surface of the shaft is coated with a lubricating layer that consists of a mixture of polyolefin and polytetrafluoroethylene. This layer is designed to adhere sufficiently to prevent abrasion during manual handling while being weak enough to strip partially during the assembly process. This invention is particularly relevant for aircraft structure assembly.
Career Highlights
Throughout his career, Johan has worked with prominent companies in the aerospace sector, including Lisi Aerospace and Hi-Shear Corporation. His contributions to these organizations have been instrumental in advancing technologies related to fasteners and coatings.
Collaborations
Johan has collaborated with notable professionals in his field, including Laurent Bourges and Christophe Van Daele. Their combined expertise has fostered innovation and development in the aerospace industry.
Conclusion
Johan Stephan's innovative patents and contributions to the aerospace industry highlight his significant role as an inventor. His work in electrical conductivity and fastener technology continues to influence advancements in aerospace applications.