John Thomas Leman

This inventor holds 17 USPTO granted patents and 6 published patent applications, plus 1 CIPO patent and 6 EPO patents, primarily in Material Science. Top assignees: General Electric Company, Momentive Performance Materials Gmbh. Active years: 2002-2018.

IDiyas Innovation Intelligence. (2026). Inventor Profile: John Thomas Leman. Retrieved from https://idiyas.com/inventor/john-thomas-leman

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Calculating rank

USPTO Granted Patents = 17 (Patent Applications = 6)

% Patents Active = 82.4

CIPO Patents = 1

EPO Patents = 6 (Patent Applications = 7)

Average Co-Inventor Count = 2.8

ph-index = 7

Forward Citations = 242(Granted Patents)

Location History:

Niskayuna, NY (US) (2002 - 2011)
Schenectady, NY (US) (2016 - 2018)

Company Filing History:

13 out of 52,404

General Electric Company

patents

4 out of 590

Momentive Performance Materials Gmbh

patents

Years Active: 2002-2018

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Areas of Expertise:

Investment Casting

Electrochemical Cells

Crystalline Composition

Silicone Binders

Nitride Crystals

Semiconductor Detectors

Copolymer Sealants

Thin Wall Core Die

Coated Substrates

Fluorosilicone Composition

17 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 9950358 - Compositions for cores used in investment casting (2018-04-24),

2. 9387600 - Method of preparing a mold to form an article and method of forming the article with the mold (2016-07-12),

3. 9381681 - Method of preparing a mold to form an article and method of forming the article with the mold (2016-07-05),

4. 9368840 - Method for maintaining the performance level of an electrochemical cell (2016-06-14),

5. 8039412 - Crystalline composition, device, and associated method (2011-10-18),

6. 7942970 - Apparatus for making crystalline composition (2011-05-17),

7. 7935382 - Method for making crystalline composition (2011-05-03),

8. 7732526 - Silicone binders for investment casting (2010-06-08),

9. 7642122 - Method for forming nitride crystals (2010-01-05),

10. 7487819 - Disposable thin wall core die, methods of manufacture thereof and articles manufactured therefrom (2009-02-10),

11. 7316746 - Crystals for a semiconductor radiation detector and method for making the crystals (2008-01-08),

12. 7287573 - Silicone binders for investment casting (2007-10-30),

13. 6797796 - Copolymer sealant compositions and method for making (2004-09-28),

14. 6646090 - Copolymer sealant compositions and method for making (2003-11-11),

15. 6562470 - Method for making coated substrates and articles made thereby (2003-05-13),

Title: The Innovative Contributions of John Thomas Leman

Introduction

John Thomas Leman is a notable inventor based in Niskayuna, NY (US). He has made significant contributions to the field of materials science, particularly in investment casting. With a total of 17 patents to his name, Leman's work has had a profound impact on the industry.

Latest Patents

Leman's latest patents include innovative compositions for cores used in investment casting. One of his notable inventions is a ceramic core that predominantly comprises mullite, derived from a precursor of alumina particles and siloxane binders. This ceramic body contains free silica, which is largely unavailable for reaction with metal alloys used in investment casting. Additionally, he has developed methods for making cast metal articles, including a method of preparing a mold to form an article. This method involves preparing a quantity of fluid with lightweight oil, submerging the mold in the fluid, and creating a negative pressure to remove air from internal cavities.

Career Highlights

Throughout his career, Leman has worked with prominent companies such as General Electric Company and Momentive Performance Materials GmbH. His experience in these organizations has allowed him to refine his skills and contribute to various innovative projects.

Collaborations

Leman has collaborated with several talented individuals in his field, including Mark Philip D'Evelyn and Dong-Sil Park. These collaborations have further enhanced his work and led to the development of groundbreaking technologies.

Conclusion

John Thomas Leman's contributions to the field of investment casting and materials science are noteworthy. His innovative patents and collaborations with industry professionals highlight his dedication to advancing technology. His work continues to influence the industry and inspire future innovations.

Profile summary based on public USPTO records.