Forward Citations = 170

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2 inventors (with patents filed for the assignee):

Edmond D Chammas (4 out of 4 patents)

Edwin C Lewis, Ii (2 out of 4 patents)

5 patents: Sort by Forward Citations

1. 4270440 - High pressure piston and seal (1981-06-02),

2. 4250960 - Chemical cutting apparatus (1981-02-17),

3. 4180131 - Chemical cutting apparatus for use in wells (1979-12-25),

4. 4158389 - Chemical cutting apparatus and method for use in wells (1979-06-19),

5. 4125161 - Chemical cutting apparatus and method for use in wells (1978-11-14),

Weatherford is an oil and gas service company that provides innovative solutions and services for the drilling, evaluation, completion, production and intervention of oil and natural gas wells. With a global presence and a commitment to safety and sustainability, Weatherford is a trusted partner for the energy industry.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

5 Patents

#844 in Houston, TX

#3,330 in Texas

#51,570 in US

Houston, TX, United States of America

Weatherford/dmc, Inc.

Forward Citations = 170

2 inventors:

Edmond D Chammas (4 out of 4 patents)

Edwin C Lewis, Ii (2 out of 4 patents)

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