Patent Assignment
Reel/Frame 074289/0388
Change of Name
Recorded: 2026-01-08
Pages: 7
Assignor
MARKWEST ENERGY PARTNERS, L.P.
Executed: 2025-12-23
Assignee
MARKWEST ENERGY PARTNERS LLC
1515 ARAPAHOE STREET, TOWER 1, SUITE 1600, DENVER, COLORADO, 80202
Covered Properties
(10)
Heavy Compressor Valve Lifting Tool and Associated Methods
Patent:
10,486,946 →
Application:
16/221,701 →
System, Method, and Apparatus for Determining Air Emissions During Pig Receiver Depressurization
Patent:
10,247,643 →
Application:
16/190,577 →
Pig Ramp, System and Method
Patent:
10,408,377 →
Application:
16/150,454 →
System, Method, and Apparatus for Determining Air Emissions During Pig Receiver Depressurization
Patent:
10,168,255 →
Application:
16/003,250 →
Pig Ramp, System and Method
Patent:
10,197,206 →
Application:
15/987,057 →
Heavy Compressor Valve Lifting Tool and Associated Methods
Patent:
10,196,243 →
Application:
15/907,582 →
Pig Ramp, System and Method
Patent:
10,094,508 →
Application:
15/896,149 →
Pig Ramp, System and Method
Patent:
10,012,340 →
Application:
15/896,172 →
Pig Ramp, System and Method
Patent:
10,001,240 →
Application:
15/798,479 →
System, Method, and Apparatus for Determining Air Emissions During Pig Receiver Depressurization
Patent:
10,024,768 →
Application:
15/626,109 →
Related Assignments
(9)
Other recorded transfers of the patents in this record — the chain of ownership.
Assignment of Assignor's Interest
Jun 19, 2017
From: JOHNSEN, DAVID
To: MARKWEST ENERGY PARTNERS, L.P.
Reel/Frame 042747/0693 →
Assignment of Assignor's Interest
Oct 31, 2017
From: DRAY, DANNY LEE; CROWE, BRYAN ANTHONY; FITCH, DAVID ABRAHAM; SPROWLS, WILLIAM LEE
To: MARKWEST ENERGY PARTNERS, L.P.
Reel/Frame 043988/0433 →
Assignment of Assignor's Interest
Feb 14, 2018
From: DRAY, DANNY LEE; CROWE, BRYAN ANTHONY; FITCH, DAVID ABRAHAM; SPROWLS, WILLIAM LEE
To: MARKWEST ENERGY PARTNERS, L.P.
Reel/Frame 044922/0272 →
Assignment of Assignor's Interest
Feb 28, 2018
From: WELLS, ERNIE
To: MARKWEST ENERGY PARTNERS, L.P.
Reel/Frame 045062/0240 →
Assignment of Assignor's Interest
May 23, 2018
From: DRAY, DANNY LEE; CROWE, BRYAN ANTHONY; FITCH, DAVID ABRAHAM; SPROWLS, WILLIAM LEE
To: MARKWEST ENERGY PARTNERS, L.P.
Reel/Frame 045880/0971 →
Assignment of Assignor's Interest
Jun 8, 2018
From: JOHNSEN, DAVID
To: MARKWEST ENERGY PARTNERS, L.P.
Reel/Frame 046024/0426 →
Assignment of Assignor's Interest
Oct 3, 2018
From: DRAY, DAN LEE; CROWE, BRYAN ANTHONY; FITCH, DAVID ABRAHAM; SPROWLS, WILLIAM LEE
To: MARKWEST ENERGY PARTNERS, L.P.
Reel/Frame 047050/0806 →
Assignment of Assignor's Interest
Nov 14, 2018
From: JOHNSEN, DAVID
To: MARKWEST ENERGY PARTNERS, L.P.
Reel/Frame 047499/0200 →
Assignment of Assignor's Interest
Dec 17, 2018
From: WELLS, ERNIE
To: MARKWEST ENERGY PARTNERS, L.P.
Reel/Frame 047790/0903 →