Where does Spero Therapeutics, Inc. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Spero Therapeutics, Inc. ranks #37,661 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 Spero Therapeutics, Inc. hold?

Spero Therapeutics, Inc. holds 7 US utility patents granted between 2021 and 2025, spanning 6 technology areas.

What is Spero Therapeutics, Inc.'s Innovation Score?

Spero Therapeutics, Inc. has an Innovation Score of 46.9 out of 100 (top 20% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Spero Therapeutics, Inc. focus on?

Spero Therapeutics, Inc.'s top technology area is A61K (Preparations FOR Medical, Dental OR Toiletry Purposes) with 7 patents, ranking #3,032 of 7,163 assignees active in that subclass. Grants appear in 6 CPC subclasses total.

Is Spero Therapeutics, Inc.'s patent grant rate increasing or decreasing?

Insufficient historical data is available to calculate a velocity trend for Spero Therapeutics, Inc..

What does claim depth mean for Spero Therapeutics, Inc.'s patents?

Spero Therapeutics, Inc.'s patents average 18.4 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 Spero Therapeutics, 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

Spero Therapeutics, Inc.

USPTO PatentsView assignee record - 7 granted patents across 6 technology areas, recorded in grant years 2021–2025. 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, Spero ranks #37,661 of 49,997 tracked US assignees by granted-patent volume, with 7 patents across 6 technology areas.

#37,661
of 49,997 US assignees by volume: Top 20%
by Innovation Score (46.9/100): 18.4
avg claims per patent

USPTO PatentsView assignee plate

Corpus R37661 · US Corporation #37,661 · 7 grants

GRANTS-MICRO · LOWER-Q · PHOTO-FINISH · CPC-NARROW · INNOV-PAR · CLAIMS-RICH · TYPE-USCORP · SPAN-YRS · BOOK-RICH

GRANTS-MICRO 7 grants
LOWER-Q #37,661/49,997
PHOTO-FINISH Spartech
CPC-NARROW A61K · 6 areas
INNOV-PAR 46.9/100
CLAIMS-RICH 18.4 claims/avg
TYPE-USCORP US Corporation
SPAN-YRS 2021–2025 · 5y
BOOK-RICH 9/10 fields

Nearest grant-volume peer: Spartech, LLC (±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 Spero’s 46.9 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 7.2 pts (15%) Velocity 20.0 pts (43%) Breadth 8.7 pts (19%) Claim depth 11.1 pts (24%)

Qualcomm Incorporated · highest

85
Handylab · near

47
Inertech IP · near

47
Microport Orthopedic… · near

47
Nissei Plastic… · near

47
Spero Therapeutics · this assignee

47
3D Lighting… · lowest

7

What this shows Spero's Innovation Score is 46.9/100 (top 20% 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 Spero?

Each dot is one of Spero’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). Spero’s own 18.4 claims/patent is ABOVE the 14.7 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

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

Where Spero's grants concentrate

Spero Therapeutics, Inc. is a focused PatentsView assignee: 6 CPC subclasses with 100% of grants classified under A61K (Preparations FOR Medical, Dental OR Toiletry Purposes). Peak complete grant year is 2024 (3 grants) versus a trough of 1 in 2021. By volume, Spero sits between Spartech, LLC and SR Labs, Inc..

Spero's three-year grant acceleration

Spero Therapeutics, Inc. shows 5 grants in 2022–2024 against only 1 in 2019–2021. That prior window is too thin for a growth multiple (rename and spin-out assignees look artificially high when the baseline is near zero), so PlainPatent withholds a ranked acceleration claim here.

Spartech

7
Speaqua

7
Spectre Materials…

7
Spectro Analytica…

7
Spinethera

7
Spire Global Subs…

7
Spring Loaded Tec…

7
SR Labs

7
Spero Therapeutics ◀

7

What this shows Spero holds 7 patents at rank #37,472, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Spero

By rank, the assignees closest to #37,472 in granted patent volume.

Leaders in A61K (Preparations FOR Medical)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Spero, neither rank-band nor same-CPC leaders (those blocks stay above). In A61K (Preparations FOR Medical), Spero ranks #3,032 of 7,163 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (47 here).

Nissei Plastic Industrial Co., Ltd. 47 Inertech IP LLC 47 Microport Orthopedics Holdings, Inc. 47 Handylab, Inc. 47

Spero's Innovation Score vs. every tracked assignee

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

47 Top 20% higher than 80% 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 · 2021–2025

Grants by year

Teal-shaded recent years (2020–present) versus the 2021–2019 baseline. Full figures in the table below.

View data table

Spero Therapeutics, Inc. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2021	1	14.3%
2022	1	14.3%
2023	1	14.3%
2024	3	42.9%
2025partial year	1	14.3%

Which technologies does Spero Therapeutics, Inc. patent most?

A61K - Preparations FOR Medical, Dental OR Toiletry Purposes 7

A61P - Specific Therapeutic Activity OF Chemical Compounds OR Medicinal Preparations 6

Y02A - Technologies FOR Adaptation TO Climate Change 6

C07B - General Methods OF Organic CHEMISTRY; Apparatus Therefor 3

C07D - Heterocyclic Compounds 3

C07K - Peptides 2

Top 6 of 6 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

Spero Therapeutics, Inc.'s patent record in context - here's where to go next.

Spero Therapeutics, 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 #37,661 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Spero Therapeutics, Inc. against Spartech, LLC, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 46.9/100 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.