Intellectual Property
U.S. Patents
Welker holds 90+ U.S. patents covering innovative designs across gas sampling, odorization, chemical injection, and instrumentation technologies — a testament to more than 70 years of continuous engineering innovation.
| Patent No. | Invention Title | Technology |
|---|---|---|
| 7,471,882 | Heated Regulator with Removable Heat Inducer & Fluid Heater & Methods of Use | Instrumentation |
| 7,493,914 | Newtonian Thrust Cowl Array | Other |
| 7,856,997 | Removable Automatic Insertion Device with Segmented Drainage Shaft | Sampling |
| 8,113,070 | Sight Glass with a Flow Directing Assembly | Instrumentation |
| 8,202,331 | Pump Purge Apparatus and Method | Pumps & Injection |
| 8,210,058 | LNG Sampling Cylinder and Method | LNG |
| 8,347,694 | LNG Collection System and Method | LNG |
| 8,800,394 | Transportable Liquid Phase LNG Sample Apparatus and Method | LNG |
| 9,255,862 | Gasoline Blend Spot Sampling System and Method | Sampling |
| 9,410,541 | Liquid Sample Pump With Integral Self-Cleaning Filter Element | Sampling |
| 9,506,842 | Volumetric Sample Adjustment Assembly Located Outside a Liquid Process Line | Sampling |
| 9,651,459 | Gasoline Blend Spot Sampling System and Method | Sampling |
| 10,344,237 | System and Method for Odorizing Natural Gas | Odorization |
| 10,995,293 | System and Method for Odorizing Natural Gas | Odorization |
| 11,187,633 | Liquefied Natural Gas Vaporization Sampling System | LNG |
| 11,209,838 | Method for Odorizing Natural Gas | Odorization |
| 11,499,894 | Sample Pressure Reducing System | Sampling |
| 11,624,481 | Odorization System | Odorization |
| 12,158,141 | Inverted Fluid Chamber | Other |
| 12,264,995 | Leak Monitoring Manifold for a Pumping System | Pumps & Injection |
Try a patent number (11624481), a keyword (odorizing, LNG), or set the technology to All. Questions? Call 281.491.2331 or email sales@welker.com.
Understanding Patents
What Does a U.S. Patent Protect?
A U.S. patent gives its owner the right to stop others from making, using, or selling the patented invention in the United States for a limited time. Welker’s patents protect the engineering behind its sampling, odorization, and injection equipment.
Granted by the USPTO
Every patent listed here was examined and granted by the U.S. Patent & Trademark Office (USPTO).
Protected Innovation
Patents cover the original designs and methods inside Welker products, from LNG sampling cylinders to natural gas odorization systems.
Public Record
Each patent number links to its full public record, including the abstract, drawings, and claims.
This page lists selected Welker patents. Welker holds 90+ U.S. patents in total.
Find More Welker Documentation
Trademarks, certifications, manuals, and technical papers — all in one place.
Welker Trademark List
Welker’s registered ® and common law ™ trademarks and service marks.
View Trademarks →Certifications & Compliance
ISO, CRN, CSA, DOT, and Transport Canada certification and compliance documentation.
View Certifications →IOM Manuals
Installation, Operation & Maintenance manuals for Welker products, current and legacy.
View IOM Manuals →Technical Papers
Technical papers and publications authored by Welker engineers.
Read Papers →Case Studies
See the systems Welker is delivering in the field — LPG, flare gas, refined products, and more.
View Case Studies →All Resources
Browse IOMs, certifications, papers, patents, events, and the Welker trademark list.
Browse Resources →Explore Our Trademark Portfolio
In addition to 90+ patents, Welker maintains an extensive portfolio of trademarks and service marks covering our branded products and technologies.
