Where does North American Refractories Company rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), North American Refractories Company ranks #49,168 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 North American Refractories Company hold?

North American Refractories Company holds 5 US utility patents granted between 2015 and 2017, spanning 3 technology areas.

What is North American Refractories Company's Innovation Score?

North American Refractories Company has an Innovation Score of 24.7 out of 100 (15th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does North American Refractories Company focus on?

North American Refractories Company's top technology area is B22D (Casting OF METALS; Casting OF Other Substances BY THE Same Processes OR Devices) with 5 patents, ranking #78 of 377 assignees active in that subclass. Grants appear in 3 CPC subclasses total.

Is North American Refractories Company's patent grant rate increasing or decreasing?

North American Refractories Company's recent grant velocity is -100% 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 North American Refractories Company's patents?

North American Refractories Company's patents average 20.6 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 North American Refractories Company 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

North American Refractories Company

USPTO PatentsView assignee record - 5 granted patents across 3 technology areas, recorded in grant years 2015–2017. 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: B22D (Casting OF METALS; Casting OF Other Substances BY THE Same Processes OR Devices).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, North ranks #49,168 of 49,997 tracked US assignees by granted-patent volume, with 5 patents across 3 technology areas.

#49,168
of 49,997 US assignees by volume: 15th percentile
by Innovation Score (24.7/100): 20.6
avg claims per patent: -100%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R49168 · US Corporation #49,168 · 5 grants

GRANTS-MICRO · BOTTOM-DECILE · PHOTO-FINISH · CPC-NARROW · INNOV-THIN · CLAIMS-DENSE · TYPE-USCORP · VEL-DROP · BOOK-FULL

GRANTS-MICRO 5 grants
BOTTOM-DECILE #49,168/49,997
PHOTO-FINISH Norad Designs
CPC-NARROW B22D · 3 areas
INNOV-THIN 24.7/100
CLAIMS-DENSE 20.6 claims/avg
TYPE-USCORP US Corporation
VEL-DROP -100% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Norad Designs 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 North’s 24.7 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 6.2 pts (25%) Velocity 0.0 pts (0%) Breadth 6.1 pts (25%) Claim depth 12.4 pts (50%)

Qualcomm Incorporated · highest

85
North American… · this assignee

25
3D Lighting… · lowest

7

What this shows North's Innovation Score is 24.7/100 (15th 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 North?

Each dot is one of North’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). North’s own 20.6 claims/patent is ABOVE the 17.8 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

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

Where North's grants concentrate

North American Refractories Company is a focused PatentsView assignee: 3 CPC subclasses with 100% of grants classified under B22D (Casting OF METALS; Casting OF Other Substances BY THE Same Processes OR Devices). Peak complete grant year is 2017 (3 grants) versus a trough of 2 in 2015. By volume, North sits between Norad Designs LLC and Northstar Earth & Space Inc..

Norad Designs

5
Nordhydraulic AB

5
Nordic Minesteel

5
Norse Networks

5
North American Re…

5
Northern Light Gr…

5
Northern Therapeu…

5
Northstar Earth &…

5
North American Re… ◀

5

What this shows North holds 5 patents at rank #49,065, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near North

By rank, the assignees closest to #49,065 in granted patent volume.

Leaders in B22D (Casting OF Metals)

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

North's Innovation Score vs. every tracked assignee

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

25 15th percentile higher than 15% 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 · 2015–2017

Grants by year

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

View data table

North American Refractories Company patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	2	40.0%
2017	3	60.0%

Which technologies does North American Refractories Company patent most?

B22D - Casting OF METALS; Casting OF Other Substances BY THE Same Processes OR Devices 5

B66C - CRANES; Load-engaging Elements OR Devices FOR Cranes, Capstans, Winches, OR Tackles 3

F27D - Details OR Accessories OF Furnaces, Kilns, Ovens OR Retorts, IN SO FAR AS They ARE OF Kinds Occurring IN More Than ONE Kind OF Furnace 1

Top 3 of 3 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

North American Refractories Company's patent record in context - here's where to go next.

North American Refractories Company's lead technology class is B22D (Casting OF METALS; Casting OF Other Substances BY THE Same Processes OR Devices), 100% of its portfolio - see every assignee active in that class. Explore B22D
Ranked #49,168 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare North American Refractories Company against Norad Designs LLC, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 24.7/100 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.