Dennis Mark Lettkeman

This inventor holds 21 USPTO granted patents, plus 8 CIPO patents and 5 EPO patents, primarily in Cementitious Compositions. Top assignee: United States Gypsum Company. Active years: 2006-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Dennis Mark Lettkeman. Retrieved from https://idiyas.com/inventor/dennis-mark-lettkeman

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

USPTO Granted Patents = 21

% Patents Active = 76.2

CIPO Patents = 8 (Patent Applications = 3)

EPO Patents = 5 (Patent Applications = 2)

Average Co-Inventor Count = 4.5

ph-index = 9

Forward Citations = 255(Granted Patents)

Location History:

Watonga, OK (US) (2006 - 2019)
Tulsa, OK (US) (2019 - 2020)

Company Filing History:

21 out of 725

United States Gypsum Company

patents

Years Active: 2006-2025

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Areas of Expertise:

Gypsum Products

Cementitious Compositions

Fast Drying Solutions

High Strength Flooring

Synthetic Gypsum

Aggregate Stabilizers

Pourable Compositions

Modifiers for Gypsum

Slurry Dispenser

Wallboard Mounting Channel

Ultra-Light Mixtures

Cementing Products

21 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 12291485 - Gypsum cement compositions with aggregate stabilizers and methods for forming floor underlayment (2025-05-06),

2. 10662114 - Ultra-light cementitious compositions and related methods (2020-05-26),

3. 10260241 - Resilient wallboard mounting channel accommodating standard fasteners (2019-04-16),

4. 10221100 - Pourable compositions (2019-03-05),

5. 9975808 - Ultra-light cementitious compositions and related methods (2018-05-22),

6. 9944556 - Compositions with synthetic gypsum and methods (2018-04-17),

7. 9708220 - Cementitious patch compositions and methods (2017-07-18),

8. 9346996 - Oil well cementing products with synthetic gypsum and methods (2016-05-24),

9. 8343273 - Method of modifying beta stucco using diethylene-triamine-pentaacetic acid (2013-01-01),

10. 7932308 - Modifiers for gypsum slurries and method of using them (2011-04-26),

11. 7776462 - Gypsum products utilizing a two-repeating unit dispersant and a method of making them (2010-08-17),

12. 7767019 - Gypsum products utilizing a two-repeating unit dispersant and a method for making them (2010-08-03),

13. 7754007 - Gypsum mixtures for forming solids (2010-07-13),

14. 7608347 - Modifiers for gypsum slurries and method of using them (2009-10-27),

15. 7572329 - Method of making a gypsum slurry with modifiers and dispersants (2009-08-11),

Title: The Inventor Profile: Dennis Mark Lettkeman

Introduction:

Dennis Mark Lettkeman, a prolific inventor based in Tulsa, Oklahoma (US), has made significant contributions to the field of construction materials with a total of 20 patents to his name.

Latest Patents:

Lettkeman's latest patents include the development of ultra-light cementitious compositions with improved density control and ultra-low water demand. Additionally, he has patented an innovative resilient wallboard mounting channel that accommodates standard fasteners with ease.

Career Highlights:

Currently working at the United States Gypsum Company, Lettkeman has been instrumental in revolutionizing cementitious products and construction materials. His expertise has led to the creation of novel solutions aimed at enhancing efficiency and performance in the industry.

Collaborations:

Lettkeman has collaborated with esteemed colleagues such as John Wesley Wilson and Raymond A. Kaligian, further showcasing his dedication to teamwork and innovation in the workplace.

Conclusion:

Dennis Mark Lettkeman's innovative spirit and dedication to advancing construction materials have established him as a prominent figure in the field of inventing. His patented creations continue to shape the industry and pave the way for future developments in the field.

Profile summary based on public USPTO records.