For the Inventor, By the Inventor

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Baltimore, MD, United States of America

Environmental Technologies Group, Inc.

USPTO Granted Patents = 14

Forward Citations = 357

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22 inventors (with patents filed for the assignee):

Glenn E Spangler (6 out of 14 patents)

Julio A Reategui (4 out of 5 patents)

Allan T Bacon (4 out of 4 patents)

4. Donald N Campbell (3 out of 12 patents)

5. Robert C Davis, Jr (2 out of 6 patents)

6. Richard C Getz (2 out of 2 patents)

7. Peter C Stroosnyder (2 out of 2 patents)

8. John P Carrico (1 out of 2 patents)

9. Joseph L Mangum (1 out of 1 patent)

10. Jesse C Patton (1 out of 1 patent)

11. Kishore N Vora (1 out of 4 patents)

12. John P Carrico, Jr (1 out of 2 patents)

13. Eugene F Fafaul (1 out of 1 patent)

14. Joseph E Roehl (1 out of 1 patent)

15. Alvin Dorman (1 out of 1 patent)

14 patents: Sort by Forward Citations

1. 5830344 - Disposable sensor for metal analysis and method of using same (1998-11-03),

2. 5587581 - Method and an apparatus for an air sample analysis (1996-12-24),

3. 5554846 - Apparatus and a method for detecting alarm molecules in an air sample (1996-09-10),

4. 5338931 - Photoionization ion mobility spectrometer (1994-08-16),

5. 5283199 - Chlorine dioxide monitor based on ion mobility spectrometry with (1994-02-01),

6. 5234838 - Ammonia monitor based on ion mobility spectrometry with selective dopant (1993-08-10),

7. 5095206 - Method and apparatus for improving the specificity of an ion mobility (1992-03-10),

8. 5083019 - Preconcentrator for ion mobility spectrometer (1992-01-21),

9. 5053343 - Selective ionization of gas constituents using electrolytic reactions (1991-10-01),

10. 5032721 - Acid gas monitor based on ion mobility spectrometry (1991-07-16),

11. 5021654 - All ceramic ion mobility spectrometer cell (1991-06-04),

12. 4950893 - Method and apparatus for enhanced ion spectra generation and detection (1990-08-21),

13. 4933285 - Multiple monolayers of polymeric linkages on a solid phase for (1990-06-12),

14. 4928033 - Thermionic ionization source (1990-05-22),

Environmental Technologies Group, Inc. specializes in providing innovative and sustainable environmental solutions for industries worldwide. With a focus on reducing carbon footprint and promoting sustainability, we offer a wide range of products and services including waste management, energy efficiency, and pollution control technologies. Our team of experts is dedicated to helping clients achieve their environmental goals while also improving their bottom line.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 23 2025

14 Patents

#33 in Baltimore, MD

#294 in Maryland

#21,600 in US

#40,903 in the World

Baltimore, MD, United States of America

Environmental Technologies Group, Inc.

Forward Citations = 357

22 inventors:

Glenn E Spangler (6 out of 14 patents)

Julio A Reategui (4 out of 5 patents)

Allan T Bacon (4 out of 4 patents)

4. Donald N Campbell (3 out of 12 patents)

5. Robert C Davis, Jr (2 out of 6 patents)

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