Where does Markwest Energy Partners, L.P. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Markwest Energy Partners, L.P. ranks #24,753 of 49,997 assignees by granted-patent volume, the same sort as the companies listing and top-holders ranking. See /methodology/#corpus-placement.

How many patents does Markwest Energy Partners, L.P. hold?

Markwest Energy Partners, L.P. holds 11 US utility patents granted between 2018 and 2020, spanning 5 technology areas.

What is Markwest Energy Partners, L.P.'s Innovation Score?

Markwest Energy Partners, L.P. has an Innovation Score of 25.2 out of 100 (17th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Markwest Energy Partners, L.P.'s patent grant rate increasing or decreasing?

Markwest Energy Partners, L.P.'s recent grant velocity is -90% compared to the prior five-year period (grant years, not application filing dates). Grant activity has slowed relative to earlier years.

What does claim depth mean for Markwest Energy Partners, L.P.'s patents?

Markwest Energy Partners, L.P.'s patents average 14.4 claims each. This is an aggregate descriptive count from the grant record; it does not establish claim scope, legal strength, enforceability, or design-around risk.

How is the Markwest Energy Partners, L.P. patent data sourced?

All patent data comes from USPTO PatentsView, a public research dataset maintained by the United States Patent and Trademark Office covering US granted utility patents from 2015 to 2025.

USPTO 2015–2025 USPTO PatentsView US Corporation

Markwest Energy Partners, L.P.

Q: What technology areas does Markwest Energy Partners, L.P. focus on?

Markwest Energy Partners, L.P.'s top technology area is F16L (PIPES; Joints OR Fittings FOR PIPES; Supports FOR Pipes, Cables OR Protective TUBING; Means FOR Thermal Insulation IN General) with 9 patents, ranking #214 of 1,907 assignees active in that subclass. Grants appear in 5 CPC subclasses total.

USPTO PatentsView assignee record - 11 granted patents across 5 technology areas, recorded in grant years 2018–2020. Grant-trend analysis is cross-referenced to USPTO Patent Public Search; it does not measure application filings, current R&D, or legal strength. Primary class: F16L (PIPES; Joints OR Fittings FOR PIPES; Supports FOR Pipes, Cables OR Protective TUBING; Means FOR Thermal Insulation IN General).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Markwest ranks #24,753 of 49,997 tracked US assignees by granted-patent volume, with 11 patents across 5 technology areas.

#24,753
of 49,997 US assignees by volume: 17th percentile
by Innovation Score (25.2/100): 14.4
avg claims per patent: -90%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R24753 · US Corporation #24,753 · 11 grants

GRANTS-MICRO · MID-PACK · PHOTO-FINISH · CPC-NARROW · INNOV-THIN · CLAIMS-RICH · TYPE-USCORP · VEL-DROP · BOOK-FULL

GRANTS-MICRO 11 grants
MID-PACK #24,753/49,997
PHOTO-FINISH Mahle Electric…
CPC-NARROW F16L · 5 areas
INNOV-THIN 25.2/100
CLAIMS-RICH 14.4 claims/avg
TYPE-USCORP US Corporation
VEL-DROP -90% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Mahle Electric Drives Japan Corporation (±0 grants)

Instrument codes from this assignee’s USPTO PatentsView grant sheet: volume band, corpus rank, photo-finish peer, lead CPC, Innovation Score, claim depth, assignee type, velocity, and book completeness. Not a USPTO rating of patent strength.

How Markwest’s 25.2 Innovation Score adds up

The same four weighted components behind every Innovation Score on PlainPatent: portfolio volume, grant velocity, technology breadth, and claim depth.

Volume 8.6 pts (34%) Velocity 0.0 pts (0%) Breadth 7.9 pts (31%) Claim depth 8.7 pts (35%)

Qualcomm Incorporated · highest

85
Markwest Energy… · this assignee

25
3D Lighting… · lowest

7

What this shows Markwest's Innovation Score is 25.2/100 (17th percentile of the PatentsView-derived corpus). The chart places that score against the nearest Innovation Score peers plus corpus poles, not a reprint of the volume ranking.

Does more volume mean deeper claims for Markwest?

Each dot is one of Markwest’s 8 nearest volume peers (same corpus rank neighbourhood as the chart above), placed by total granted patents (horizontal) against average claims per patent (vertical). Markwest’s own 14.4 claims/patent is ABOVE the 8.3 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

Markwest vs its 8 nearest volume peers: granted patents vs average claims per patent. Source: USPTO PatentsView.

Where Markwest's grants concentrate

Markwest Energy Partners, L.P. is a focused PatentsView assignee: 5 CPC subclasses with 81.8% of grants classified under F16L (PIPES; Joints OR Fittings FOR PIPES; Supports FOR Pipes, Cables OR Protective TUBING; Means FOR Thermal Insulation IN General). Peak complete grant year is 2019 (6 grants) versus a trough of 1 in 2020. By volume, Markwest sits between Mahle Electric Drives Japan Corporation and Mattur Holdings, Inc..

Mahle Electric Dr…

11
Maia Pharmaceutic…

11
Maintech

11
Manta Sleep

11
Maruzen

11
Masarykova Univer…

11
Massachusetts Gen…

11
Mattur Holdings

11
Markwest Energy P… ◀

11

What this shows Markwest holds 11 patents at rank #24,730, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Markwest

By rank, the assignees closest to #24,730 in granted patent volume.

Leaders in F16L (Pipes)

Other assignees with the most granted patents in Markwest's primary technology class.

Markwest's Innovation Score vs. every tracked assignee

Composite of portfolio volume, grant velocity, technology breadth, and claim depth (0–100)

25 17th percentile higher than 17% of 49,997 US assignees

Each bar is a band; taller bars hold more US assignees. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source USPTO PatentsView, PlainPatent Innovation Score · 2015–2025

USPTO utility patent grants by year · 2018–2020

Grants by year

Teal-shaded recent years (2020–present) versus the 2018–2019 baseline. Full figures in the table below.

View data table

Markwest Energy Partners, L.P. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2018	4	36.4%
2019	6	54.5%
2020	1	9.1%

Which technologies does Markwest Energy Partners, L.P. patent most?

F16L - PIPES; Joints OR Fittings FOR PIPES; Supports FOR Pipes, Cables OR Protective TUBING; Means FOR Thermal Insulation IN General 9

G01N - Investigating OR Analysing Materials BY Determining Their Chemical OR Physical Properties 3

F04B - Positive-displacement Machines FOR LIQUIDS; Pumps 2

B66C - CRANES; Load-engaging Elements OR Devices FOR Cranes, Capstans, Winches, OR Tackles 2

B23P - Metal-working NOT Otherwise Provided FOR; Combined OPERATIONS; Universal Machine Tools 2

Top 5 of 5 technology areas

More on this record

Data Source

USPTO PatentsView, US granted patents 2015–2025

View all rankings → How is Innovation Score calculated?

What to do with this data

Markwest Energy Partners, L.P.'s patent record in context - here's where to go next.

Markwest Energy Partners, L.P.'s lead technology class is F16L (PIPES; Joints OR Fittings FOR PIPES; Supports FOR Pipes, Cables OR Protective TUBING; Means FOR Thermal Insulation IN General), 81.8% of its portfolio - see every assignee active in that class. Explore F16L
Ranked #24,753 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Markwest Energy Partners, L.P. against Mahle Electric Drives Japan Corporation, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 25.2/100 blends volume, velocity, technology breadth, and claim depth. How it's calculated

Figures reflect USPTO PatentsView grant data through May 2026; pending applications not yet granted are not counted.

Data sourced from USPTO PatentsView - official U.S. government patent data. See our methodology for computation details. Retrieved and formatted by PlainPatent

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the USPTO PatentsView database. Consult a qualified professional before making decisions based on this data.

Read our methodology - how this data is sourced, computed, and verified.

Data sources used on this page

USPTO PatentsView - the disambiguated bulk patent-grant, assignee, and CPC data this page's figures are derived from. patentsview.org
Cooperative Patent Classification (CPC) - the joint USPTO/EPO classification scheme used to group patents by technology area. cooperativepatentclassification.org
USPTO Patent Public Search - the official interface to verify the status of any individual patent. ppubs.uspto.gov

Compiled by PlainPatent, US Patent Intelligence Editorial Process · May 15, 2026

Every figure on PlainPatent is rendered directly from USPTO source data, no number is typed in by an editor. This page draws directly on USPTO source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.