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For the Inventor, By the Inventor

Pittsburgh, PA, United States of America

Dravo Corporation


USPTO Granted Patents = 123

Trademarks = 2

Forward Citations = 1,161

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110 inventors (with patents filed for the assignee):

goldMedal Louis H Jaquay (12 out of 12 patents)

silverMedal George B Karnofsky (10 out of 12 patents)

bronzeMedal Aubrey C Briggs (8 out of 17 patents)

4.  Willard Binzen (6 out of 6 patents)

5.  Fred Erich Cappel (5 out of 9 patents)

6.  Joseph Vlnaty (5 out of 5 patents)

7.  Ira W Lakin (4 out of 4 patents)

8.  Arthur F Saxon (4 out of 4 patents)

9.  Harry James Kent (4 out of 4 patents)

10.  Gilbert Blair (4 out of 4 patents)

11.  Alois Kilian (4 out of 4 patents)

12.  Donald A Gessler (3 out of 5 patents)

13.  Ernest R Ramirez (3 out of 13 patents)

14.  Thomas E Ban (3 out of 13 patents)

15.  Walter Hastik (3 out of 4 patents)


Core Competencies:
Dust Containment System
Thermal Treatment
Solvent Extraction
Rotary Car Dumper
Heat Recovery
Fine Granular Materials
Oil Shale Processing
Dust Control
Coke Spillage Removal
Pallet Construction
Tethered Vehicle
Circular Traveling Grate Machine

123 patents:

1. 4779992 - Lime slaker (1988-10-25),
2. 4760968 - Integrated dust containment system for rotary crusher/breakers and the (1988-08-02),
3. 4714097 - Dust containment system for bulk cargo containers (1987-12-22),
4. 4699187 - Dust control in hoppers (1987-10-13),
5. 4689007 - Process of thermally treating lump or agglomerated materials on a (1987-08-25),
6. 4683029 - Circular solvent extractor (1987-07-28),
7. 4655401 - Rotary car dumper with lump breaker apparatus (1987-04-07),
8. 4626418 - Removal of SO.sub.2 from SO.sub.2 -containing gases (1986-12-02),
9. 4609321 - Rotary car dumper with dust collection system (1986-09-02),
10. 4603225 - Process for separating dimethyl ether from a hydrocarbon mixture (1986-07-29),
11. 4575055 - Circular traveling grate machine (1986-03-11),
12. 4573637 - Accelerating slugs of liquid (1986-03-04),
13. 4572484 - Pallet construction for traveling grate machines (1986-02-25),
14. 4563273 - Process and apparatus for separating fines from micella streams (1986-01-07),
15. 4563195 - Method for treatment of tar-bearing fuel gas (1986-01-07),
Dravo Corporation is a leading engineering and construction company based in the United States. With a focus on heavy and industrial construction projects, Dravo has earned a reputation for delivering innovative solutions to complex challenges. Their services include project management, design, engineering, procurement, and construction across various sectors including energy, infrastructure, and manufacturing. Dravo's commitment to quality, safety, and customer satisfaction has made them a trusted partner for numerous clients worldwide.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 30 2025

123 Patents

#20 in Pittsburgh, PA

#123 in Pennsylvania

#3,029 in US

#6,318 in the World

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Pittsburgh, PA, United States of America

Dravo Corporation

Forward Citations = 1,161

110 inventors:

goldMedal Louis H Jaquay (12 out of 12 patents)

silverMedal George B Karnofsky (10 out of 12 patents)

bronzeMedal Aubrey C Briggs (8 out of 17 patents)

4.  Willard Binzen (6 out of 6 patents)

5.  Fred Erich Cappel (5 out of 9 patents)

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