Where does Merrimack Pharmaceuticals, Inc. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Merrimack Pharmaceuticals, Inc. ranks #9,320 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 Merrimack Pharmaceuticals, Inc. hold?

Merrimack Pharmaceuticals, Inc. holds 34 US utility patents granted between 2015 and 2020, spanning 12 technology areas.

What is Merrimack Pharmaceuticals, Inc.'s Innovation Score?

Merrimack Pharmaceuticals, Inc. has an Innovation Score of 35.5 out of 100 (top 49% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Merrimack Pharmaceuticals, Inc. focus on?

Merrimack Pharmaceuticals, Inc.'s top technology area is A61K (Preparations FOR Medical, Dental OR Toiletry Purposes) with 34 patents, ranking #650 of 7,163 assignees active in that subclass. Grants appear in 12 CPC subclasses total.

Is Merrimack Pharmaceuticals, Inc.'s patent grant rate increasing or decreasing?

Merrimack Pharmaceuticals, Inc.'s recent grant velocity is -97% 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 Merrimack Pharmaceuticals, Inc.'s patents?

Merrimack Pharmaceuticals, Inc.'s patents average 18.2 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 Merrimack Pharmaceuticals, Inc. 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

Merrimack Pharmaceuticals, Inc.

USPTO PatentsView assignee record - 34 granted patents across 12 technology areas, recorded in grant years 2015–2020. 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: A61K (Preparations FOR Medical, Dental OR Toiletry Purposes).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Merrimack ranks #9,320 of 49,997 tracked US assignees by granted-patent volume, with 34 patents across 12 technology areas.

#9,320
of 49,997 US assignees by volume: Top 49%
by Innovation Score (35.5/100): 18.2
avg claims per patent: -97%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R9320 · US Corporation #9,320 · 34 grants

GRANTS-SMALL · UPPER-Q · PHOTO-FINISH · CPC-FOCUS · INNOV-THIN · CLAIMS-RICH · TYPE-USCORP · VEL-DROP · BOOK-FULL

GRANTS-SMALL 34 grants
UPPER-Q #9,320/49,997
PHOTO-FINISH Mainetti (UK)
CPC-FOCUS A61K · 12 areas
INNOV-THIN 35.5/100
CLAIMS-RICH 18.2 claims/avg
TYPE-USCORP US Corporation
VEL-DROP -97% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Mainetti (UK) Ltd (±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 Merrimack’s 35.5 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 12.3 pts (35%) Velocity 0.0 pts (0%) Breadth 12.2 pts (34%) Claim depth 10.9 pts (31%)

Qualcomm Incorporated · highest

85
Beijing Kingsoft… · near

35
Lifi Labs · near

35
Merrimack Pharmaceut… · this assignee

35
Shenzhen Baseus… · near

35
TN International · near

35
3D Lighting… · lowest

7

What this shows Merrimack's Innovation Score is 35.5/100 (top 49% 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 Merrimack?

Each dot is one of Merrimack’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). Merrimack’s own 18.2 claims/patent is ABOVE the 10.4 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

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

Where Merrimack's grants concentrate

Merrimack Pharmaceuticals, Inc. is a focused PatentsView assignee: 12 CPC subclasses with 100% of grants classified under A61K (Preparations FOR Medical, Dental OR Toiletry Purposes). Peak complete grant year is 2016 (13 grants) versus a trough of 1 in 2020. By volume, Merrimack sits between Mainetti (UK) Ltd and Nextremity Solutions, Inc..

Mainetti (UK)

34
Maquet Cardiopulm…

34
Medtronic Ventor

34
Mercury Plastics

34
Messer Industries…

34
National Universi…

34
Neofect

34
Nextremity Soluti…

34
Merrimack Pharmac… ◀

34

What this shows Merrimack holds 34 patents at rank #9,326, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Merrimack

By rank, the assignees closest to #9,326 in granted patent volume.

Leaders in A61K (Preparations FOR Medical)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Merrimack, neither rank-band nor same-CPC leaders (those blocks stay above). In A61K (Preparations FOR Medical), Merrimack ranks #650 of 7,163 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (35 here).

Lifi Labs, Inc. 35 TN International 35 Beijing Kingsoft Internet Security Software Co., Ltd. 35 Shenzhen Baseus Technology Co., Ltd 35

Merrimack's Innovation Score vs. every tracked assignee

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

35 Top 49% higher than 51% 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 · 2015–2020

Grants by year

Teal-shaded recent years (2020–present) versus the 2015–2019 baseline. Full figures in the table below.

View data table

Merrimack Pharmaceuticals, Inc. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	4	11.8%
2016	13	38.2%
2017	5	14.7%
2018	9	26.5%
2019	2	5.9%
2020	1	2.9%

Which technologies does Merrimack Pharmaceuticals, Inc. patent most?

A61K - Preparations FOR Medical, Dental OR Toiletry Purposes 34

A61P - Specific Therapeutic Activity OF Chemical Compounds OR Medicinal Preparations 29

C07K - Peptides 26

G01N - Investigating OR Analysing Materials BY Determining Their Chemical OR Physical Properties 9

C12Q - Measuring OR Testing Processes Involving Enzymes, Nucleic Acids OR Microorganisms ; Compositions OR Test Papers THEREFOR; Processes OF Preparing Such COMPOSITIONS; Condition-responsive Control IN Microbiological OR Enzymological Processes 7

C12N - Microorganisms OR ENZYMES; Compositions THEREOF; Propagating, Preserving, OR Maintaining MICROORGANISMS; Mutation OR Genetic ENGINEERING; Culture Media 4

B82Y - Specific Uses OR Applications OF NANOSTRUCTURES; Measurement OR Analysis OF NANOSTRUCTURES; Manufacture OR Treatment OF Nanostructures 3

C07C - Acyclic OR Carbocyclic Compounds 2

A61J - Containers Specially Adapted FOR Medical OR Pharmaceutical PURPOSES; Devices OR Methods Specially Adapted FOR Bringing Pharmaceutical Products Into Particular Physical OR Administering FORMS; Devices FOR Administering Food OR Medicines ORALLY; Baby COMFORTERS; Devices FOR Receiving Spittle 1

C07D - Heterocyclic Compounds 1

C07H - SUGARS; Derivatives THEREOF; NUCLEOSIDES; NUCLEOTIDES; Nucleic Acids 1

Y10S - Technical Subjects Covered BY Former Uspc Cross-reference ART Collections [XRACs] AND Digests 1

Top 12 of 12 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

Merrimack Pharmaceuticals, Inc.'s patent record in context - here's where to go next.

Merrimack Pharmaceuticals, Inc.'s lead technology class is A61K (Preparations FOR Medical, Dental OR Toiletry Purposes), 100% of its portfolio - see every assignee active in that class. Explore A61K
Ranked #9,320 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Merrimack Pharmaceuticals, Inc. against Mainetti (UK) Ltd, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 35.5/100 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.