Where does C4 Carbides Limited rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), C4 Carbides Limited ranks #45,412 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 C4 Carbides Limited hold?

C4 Carbides Limited holds 5 US utility patents granted between 2020 and 2025, spanning 11 technology areas.

What is C4 Carbides Limited's Innovation Score?

C4 Carbides Limited has an Innovation Score of 32.6 out of 100 (42nd percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is C4 Carbides Limited's patent grant rate increasing or decreasing?

Insufficient historical data is available to calculate a velocity trend for C4 Carbides Limited.

What does claim depth mean for C4 Carbides Limited's patents?

C4 Carbides Limited's patents average 13.4 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 C4 Carbides Limited 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 Foreign Corporation

C4 Carbides Limited

Q: What technology areas does C4 Carbides Limited focus on?

C4 Carbides Limited's top technology area is B33Y (Additive Manufacturing, i.e. Manufacturing OF Three-dimensional [3-D] Objects BY Additive Deposition, Additive Agglomeration OR Additive Layering, e.g. BY 3-D Printing, Stereolithography OR Selective Laser Sintering) with 5 patents. Grants appear in 11 CPC subclasses total.

USPTO PatentsView assignee record - 5 granted patents across 11 technology areas, recorded in grant years 2020–2025. 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: B33Y (Additive Manufacturing, i.e. Manufacturing OF Three-dimensional [3-D] Objects BY Additive Deposition, Additive Agglomeration OR Additive Layering, e.g. BY 3-D Printing, Stereolithography OR Selective ).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, C4 ranks #45,412 of 49,997 tracked US assignees by granted-patent volume, with 5 patents across 11 technology areas.

#45,412
of 49,997 US assignees by volume: 42nd percentile
by Innovation Score (32.6/100): 13.4
avg claims per patent

USPTO PatentsView assignee plate

Corpus R45412 · Foreign Corporation #45,412 · 5 grants

GRANTS-MICRO · BOTTOM-DECILE · PHOTO-FINISH · CPC-FOCUS · INNOV-THIN · CLAIMS-RICH · TYPE-FRNCORP · SPAN-YRS · BOOK-RICH

GRANTS-MICRO 5 grants
BOTTOM-DECILE #45,412/49,997
PHOTO-FINISH C2a-sec
CPC-FOCUS B33Y · 11 areas
INNOV-THIN 32.6/100
CLAIMS-RICH 13.4 claims/avg
TYPE-FRNCORP Foreign Corp
SPAN-YRS 2020–2025 · 6y
BOOK-RICH 9/10 fields

Nearest grant-volume peer: C2a-sec, 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.

Qualcomm Incorporated · highest

85
C4 Carbides · this assignee

33
3D Lighting… · lowest

7

What this shows C4's Innovation Score is 32.6/100 (42nd 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.

Where C4's grants concentrate

C4 Carbides Limited is a focused PatentsView assignee: 11 CPC subclasses with 100% of grants classified under B33Y (Additive Manufacturing, i.e. Manufacturing OF Three-dimensional [3-D] Objects BY Additive Deposition, Additive Agglomeration OR Additive Layering, e.g. BY 3-D Printing, Stereolithography OR Selective ). Peak complete grant year is 2023 (2 grants) versus a trough of 1 in 2020. By volume, C4 sits between C2a-sec, Ltd and CADDi, Inc..

C4's three-year grant acceleration

C4 Carbides Limited shows 2 grants in 2022–2024 against only 2 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.

C2a-sec

5
C2N Diagnostics

5
C3 Jian

5
C360

5
C7 Sugar

5
Ca-digital

5
Cable Detection

5
Caddi

5
C4 Carbides ◀

5

What this shows C4 holds 5 patents at rank #45,422, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near C4

By rank, the assignees closest to #45,422 in granted patent volume.

Leaders in B33Y (Additive Manufacturing)

Other assignees with the most granted patents in C4's primary technology class.

C4's Innovation Score vs. every tracked assignee

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

33 42nd percentile higher than 42% 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 · 2020–2025

Grants by year

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

View data table

C4 Carbides Limited patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2020	1	20.0%
2021	1	20.0%
2023	2	40.0%
2025partial year	1	20.0%

Which technologies does C4 Carbides Limited patent most?

B33Y - Additive Manufacturing, i.e. Manufacturing OF Three-dimensional [3-D] Objects BY Additive Deposition, Additive Agglomeration OR Additive Layering, e.g. BY 3-D Printing, Stereolithography OR Selective Laser Sintering 5

B22F - Working Metallic POWDER; Manufacture OF Articles From Metallic POWDER; Making Metallic Powder ; Apparatus OR Devices Specially Adapted FOR Metallic Powder 3

Y02P - Climate Change Mitigation Technologies IN THE Production OR Processing OF Goods 3

C23C - Coating Metallic MATERIAL; Coating Material With Metallic MATERIAL; Surface Treatment OF Metallic Material BY Diffusion Into THE Surface, BY Chemical Conversion OR SUBSTITUTION; Coating BY Vacuum Evaporation, BY Sputtering, BY ION Implantation OR BY Chemical Vapour Deposition, IN General 3

B23K - Soldering OR UNSOLDERING; WELDING; Cladding OR Plating BY Soldering OR WELDING; Cutting BY Applying Heat Locally, e.g. Flame CUTTING; Working BY Laser Beam 3

B23D - PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; Like Operations FOR Working Metal BY Removing Material, NOT Otherwise Provided FOR 3

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

B23B - TURNING; Boring 1

C22C - Alloys 1

B29C - Shaping OR Joining OF PLASTICS; Shaping OF Material IN A Plastic State, NOT Otherwise Provided FOR; After-treatment OF THE Shaped Products, e.g. Repairing 1

B65G - Transport OR Storage Devices, e.g. Conveyors FOR Loading OR Tipping, Shop Conveyor Systems OR Pneumatic Tube Conveyors 1

Top 11 of 11 technology areas

Where it ranks

Overall rank by patents

#45,412

of 49,997 tracked assignees

Innovation Score

32.6 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

What to do with this data

C4 Carbides Limited's patent record in context - here's where to go next.

C4 Carbides Limited's lead technology class is B33Y (Additive Manufacturing, i.e. Manufacturing OF Three-dimensional [3-D] Objects BY Additive Deposition, Additive Agglomeration OR Additive Layering, e.g. BY 3-D Printing, Stereolithography OR Selective ), 100% of its portfolio - see every assignee active in that class. Explore B33Y
Ranked #45,412 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare C4 Carbides Limited against C2a-sec, Ltd, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 32.6/100 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.