Douglas A Keller

This inventor holds 24 USPTO granted patents and 7 published patent applications, plus 1 CIPO patent and 5 EPO patents, primarily in Ceramic Matrix Composites. Top assignees: Siemens Energy, Inc., Siemens Power Generation, Inc., Stryker Corporation. Active years: 2003-2015.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Douglas A Keller. Retrieved from https://idiyas.com/inventor/douglas-a-keller

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

Calculating rank

USPTO Granted Patents = 24 (Patent Applications = 7)

% Patents Active = 29.2

CIPO Patents = 1

EPO Patents = 5 (Patent Applications = 3)

Average Co-Inventor Count = 2.2

ph-index = 17

Forward Citations = 719(Granted Patents)

Location History:

West Islip, NY (US) (2003 - 2006)
Oviedo, FL (US) (2006 - 2011)
Kalamazoo, MI (US) (2008 - 2015)

Company Filing History:

Siemens Power Generation, Inc.

4. 4 out of 834,601

Other

patents

Years Active: 2003-2015

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Areas of Expertise:

Ceramic Matrix Composite

Gas Turbine

Turbine Engine

Cooling Channels

High-Temperature Seal

Refractory Component

Ring Seal

Composite Airfoil

Streak Free Processing

Attachment Mechanism

Multi-Layer Seal

Structural Components

24 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 9127565 - Apparatus comprising a CMC-comprising body and compliant porous element preloaded within an outer metal shell (2015-09-08),

2. 8257809 - CMC wall structure with integral cooling channels (2012-09-04),

3. 8211524 - CMC anchor for attaching a ceramic thermal barrier to metal (2012-07-03),

4. 8196237 - Patient support brake system (2012-06-12),

5. 8167573 - Gas turbine airfoil (2012-05-01),

6. 8061977 - Ceramic matrix composite attachment apparatus and method (2011-11-22),

7. 7950234 - Ceramic matrix composite turbine engine components with unitary stiffening frame (2011-05-31),

8. 7908867 - Wavy CMC wall hybrid ceramic apparatus (2011-03-22),

9. 7871244 - Ring seal for a turbine engine (2011-01-18),

10. 7798769 - Flexible, high-temperature ceramic seal element (2010-09-21),

11. 7726936 - Turbine engine ring seal (2010-06-01),

12. 7722317 - CMC to metal attachment mechanism (2010-05-25),

13. 7563071 - Pin-loaded mounting apparatus for a refractory component in a combustion turbine engine (2009-07-21),

14. 7534086 - Multi-layer ring seal (2009-05-19),

15. 7494317 - Ring seal attachment system (2009-02-24),

Title: **Douglas A. Keller: Innovations in Ceramic Matrix Composites**

Introduction

Douglas A. Keller, an inventor based in Kalamazoo, MI, has made significant contributions to the field of materials engineering, particularly in the development of ceramic matrix composites (CMCs). With a remarkable portfolio of 20 patents, Keller's work showcases innovative solutions to complex engineering problems, particularly involving heat resistance and structural integrity.

Latest Patents

Keller's latest patents reflect his expertise and creativity in design. One notable invention is an "Apparatus comprising a CMC-comprising body and compliant porous element preloaded within an outer metal shell." This apparatus consists of a metal shell encapsulating a body made of CMC material, incorporating features like a compliant porous element and a preload spring that optimizes functionality and durability. Another significant patent is the "CMC wall structure with integral cooling channels," which showcases a structure made of interlocking layers of woven material that includes internal cooling tubes, enhancing cooling efficiency in high-temperature environments.

Career Highlights

Keller has worked with notable companies such as Siemens Energy, Inc. and Siemens Power Generation, Inc. His tenure at these organizations has allowed him to focus on advanced material solutions that address the demanding needs of power generation and energy efficiency.

Collaborations

Throughout his career, Keller has collaborated with esteemed colleagues, including Jay Alan Morrison and Malberto Gonzalez. These partnerships have contributed to his innovative work in developing leading-edge CMC technologies.

Conclusion

Douglas A. Keller stands out as a prolific inventor whose contributions to ceramic matrix composites have significantly impacted engineering practices. His patents illustrate a commitment to innovation and problem-solving, reinforcing the importance of advancements in material sciences. As industries continue to evolve, Keller's inventions will likely play a crucial role in shaping future technologies.

Profile summary based on public USPTO records.