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CIPO Patents = 1

Trademarks = 7

Forward Citations = 161

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5 inventors (with patents filed for the assignee):

Donald L Zink (13 out of 13 patents)

Donald G Zink (8 out of 8 patents)

John E Schwartz (3 out of 20 patents)

4. Fred S Bell (1 out of 1 patent)

5. Fred S Bell (0 patent)

14 patents: Sort by Forward Citations

1. 6491736 - Polyhydric alcohol anti-dust agent for inorganic materials (2002-12-10),

2. 5386845 - Fluid transport apparatus with side recessed fitting well (1995-02-07),

3. 5312012 - Vapor space water hammer eliminator system for liquid transport (1994-05-17),

4. 5303843 - Fluid transport apparatus with water hammer eliminator system (1994-04-19),

5. 5285998 - Internal valve for pressure fluid containment vessels (1994-02-15),

6. 5280874 - Internal valve (1994-01-25),

7. 5251658 - Fluid apparatus with at least one tube well (1993-10-12),

8. 5238022 - Internal rotary valve actuator system (1993-08-24),

9. 5228473 - Internal safety valve system (1993-07-20),

10. 5222517 - Fluid containment vessel with one or more recessed wells (1993-06-29),

11. 5220943 - Internal pump assembly (1993-06-22),

12. 5211202 - Fluid apparatus with pressure-tight recessed well (1993-05-18),

13. 5141013 - Fluid containment apparatus (1992-08-25),

14. 5097976 - Fluid containment apparatus with well closure assembly (1992-03-24),

Montana Sulphur & Chemical Company is a leading provider of sulphur-based products and chemicals. With a focus on quality and customer service, we offer a wide range of products for various industries including agriculture, mining, and industrial applications. Our state-of-the-art facilities ensure the highest standards of production, safety, and environmental responsibility. Visit our website to learn more about our products and services.

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USPTO Data Jan 1 1976 - Dec 2 2025

14 Patents

#1 in Billings, MT

#20 in Montana

#21,588 in US

#40,857 in the World

Billings, MT, United States of America

Montana Sulphur & Chemical Company