This inventor holds 42 USPTO granted patents and 6 published patent applications, plus 4 CIPO patents and 5 EPO patents, primarily in Chemical Reactor Technology. Top assignees: Tubemaster, Inc., Extundo Incorporated, Uss Veteran Services Company LLC. Active years: 2003-2025.
Location History:
- Louisville, KY (2015)
- Plano, TX (US) (2019 - 2022)
- Louisville, KY (US) (2003 - 2023)
Company Filing History:
23 out of 23 
17 out of 17 
1 out of 1 Years Active: 2003-2025
Areas of Expertise:
Title: The Innovations of Clifford L. Johns: A Leader in Heat Exchanger Technology
Introduction
Clifford L. Johns, based in Louisville, KY, has made significant contributions to the field of engineering with an impressive portfolio of 40 patents. His innovative designs, particularly in the maintenance and cleaning of chemical reactor tubes, showcase his expertise and commitment to advancing industrial processes.
Latest Patents
Among his latest inventions is a **Device for Cleaning Inner Surface of Heat Exchanger Tubes**. This grit blasting arrangement is meticulously designed to ensure that the grit blast nozzle remains coaxial with the longitudinal axis of the tube being cleaned. The device incorporates a positioning frame that allows the grit blast nozzle to project outwardly, directing the outlet into the tube opening during cleaning operations. It also features a plurality of stop pins that prevent the nozzle from extending too far into the tube, thereby avoiding a venturi effect that could hinder cleaning.
Another notable patent is the **Universal Tube Marker for Identifying Chemical Reactor Tubes**. This sector marker allows for accurate and efficient placement over a tubesheet, defining an opening for maintenance on an open tube located beneath it. With at least two pins extending below the sector marker, it ensures precise positioning over the tubesheet, aiding in real-time tracking of maintenance tasks performed on the reactor tubes.
Career Highlights
Clifford has had a remarkable career with companies such as Tubemaster, Inc. and Extundo Incorporated, where he applied his engineering prowess to develop state-of-the-art cleaning and maintenance technologies. His contributions have had a lasting impact on operational efficiency and safety within the chemical processing industry.
Collaborations
Throughout his career, Clifford has collaborated with notable individuals such as Daniel D. Sympson and Dennis Patrick McAndrews. Their teamwork highlights the importance of collaboration in driving innovation and improving industrial practices.
Conclusion
Clifford L. Johns stands out as a prolific inventor, whose work continues to enhance the field of heat exchanger maintenance technology. His patents reflect a deep understanding of engineering principles and a commitment to innovation, ensuring that processes in the chemical industry remain efficient and reliable.