Where does Maerz Ofenbau AG rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Maerz Ofenbau AG ranks #36,341 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 Maerz Ofenbau AG hold?

Maerz Ofenbau AG holds 7 US utility patents granted between 2015 and 2023, spanning 10 technology areas.

What is Maerz Ofenbau AG's Innovation Score?

Maerz Ofenbau AG has an Innovation Score of 28.4 out of 100 (27th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Maerz Ofenbau AG's patent grant rate increasing or decreasing?

Maerz Ofenbau AG's recent grant velocity is -25% 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 Maerz Ofenbau AG's patents?

Maerz Ofenbau AG's patents average 13.0 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 Maerz Ofenbau AG 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

Maerz Ofenbau AG

Q: What technology areas does Maerz Ofenbau AG focus on?

Maerz Ofenbau AG's top technology area is C04B (Lime, MAGNESIA; SLAG; CEMENTS; Compositions Thereof, e.g. Mortars, Concrete OR Like Building MATERIALS; Artificial Stone ; Ceramics ; REFRACTORIES; Treatment OF Natural Stone) with 7 patents, ranking #209 of 1,052 assignees active in that subclass. Grants appear in 10 CPC subclasses total.

USPTO PatentsView assignee record - 7 granted patents across 10 technology areas, recorded in grant years 2015–2023. 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: C04B (Lime, MAGNESIA; SLAG; CEMENTS; Compositions Thereof, e.g. Mortars, Concrete OR Like Building MATERIALS; Artificial Stone ; Ceramics ; REFRACTORIES; Treatment OF Natural Stone).

Compiled by PlainPatent · May 15, 2026

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Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Maerz ranks #36,341 of 49,997 tracked US assignees by granted-patent volume, with 7 patents across 10 technology areas.

#36,341
of 49,997 US assignees by volume: 27th percentile
by Innovation Score (28.4/100): 13.0
avg claims per patent: -25%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R36341 · Foreign Corporation #36,341 · 7 grants

GRANTS-MICRO · MID-PACK · PHOTO-FINISH · CPC-FOCUS · INNOV-THIN · CLAIMS-RICH · TYPE-FRNCORP · VEL-DOWN · BOOK-FULL

GRANTS-MICRO 7 grants
MID-PACK #36,341/49,997
PHOTO-FINISH Mack & Schneider
CPC-FOCUS C04B · 10 areas
INNOV-THIN 28.4/100
CLAIMS-RICH 13.0 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DOWN -25% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Mack & Schneider GMBH (±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 Maerz’s 28.4 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 (25%) Velocity 2.2 pts (8%) Breadth 11.2 pts (39%) Claim depth 7.8 pts (27%)

Qualcomm Incorporated · highest

85
Maerz Ofenbau · this assignee

28
3D Lighting… · lowest

7

What this shows Maerz's Innovation Score is 28.4/100 (27th 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 Maerz?

Each dot is one of Maerz’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). Maerz’s own 13.0 claims/patent is at or below the 15.7 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Maerz's grants concentrate

Maerz Ofenbau AG is a focused PatentsView assignee: 10 CPC subclasses with 100% of grants classified under C04B (Lime, MAGNESIA; SLAG; CEMENTS; Compositions Thereof, e.g. Mortars, Concrete OR Like Building MATERIALS; Artificial Stone ; Ceramics ; REFRACTORIES; Treatment OF Natural Stone). Peak complete grant year is 2021 (2 grants) versus a trough of 1 in 2015. By volume, Maerz sits between M.C. Dean Inc. and Magseis AS.

Maerz's three-year grant acceleration

Maerz Ofenbau AG shows 1 grants in 2022–2024 against only 3 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.

M C Dean

7
Mack & Schneider

7
Macrae

7
MAD Catz Interact…

7
Maestro Devices

7
Magna Steyr Engin…

7
Magnesium Product…

7
Magseis AS

7
Maerz Ofenbau ◀

7

What this shows Maerz holds 7 patents at rank #36,321, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Maerz

By rank, the assignees closest to #36,321 in granted patent volume.

Leaders in C04B (Lime)

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

Maerz's Innovation Score vs. every tracked assignee

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

28 27th percentile higher than 27% 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 · 2015–2023

Grants by year

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

View data table

Maerz Ofenbau AG patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	1	14.3%
2016	1	14.3%
2018	1	14.3%
2019	1	14.3%
2021	2	28.6%
2023	1	14.3%

Which technologies does Maerz Ofenbau AG patent most?

C04B - Lime, MAGNESIA; SLAG; CEMENTS; Compositions Thereof, e.g. Mortars, Concrete OR Like Building MATERIALS; Artificial Stone ; Ceramics ; REFRACTORIES; Treatment OF Natural Stone 7

F27B - Furnaces, Kilns, Ovens OR Retorts IN GENERAL; Open Sintering OR Like Apparatus 7

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 4

Y02P - Climate Change Mitigation Technologies IN THE Production OR Processing OF Goods 4

F23L - Supplying AIR OR Non-combustible Liquids OR Gases TO Combustion Apparatus IN General ; Valves OR Dampers Specially Adapted FOR Controlling AIR Supply OR Draught IN Combustion Apparatus ; Inducing Draught IN Combustion APPARATUS; Tops FOR Chimneys OR Ventilating SHAFTS; Terminals FOR Flues 2

F23B - Methods OR Apparatus FOR Combustion Using Only Solid Fuel 1

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 1

F23N - Regulating OR Controlling Combustion 1

F27M - Indexing Scheme Relating TO Aspects OF THE Charges OR Furnaces, Kilns, Ovens OR Retorts 1

C01F - Compounds OF THE Metals Beryllium, Magnesium, Aluminium, Calcium, Strontium, Barium, Radium, Thorium, OR OF THE Rare-earth Metals 1

Top 10 of 10 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

Maerz Ofenbau AG's patent record in context - here's where to go next.

Maerz Ofenbau AG's lead technology class is C04B (Lime, MAGNESIA; SLAG; CEMENTS; Compositions Thereof, e.g. Mortars, Concrete OR Like Building MATERIALS; Artificial Stone ; Ceramics ; REFRACTORIES; Treatment OF Natural Stone), 100% of its portfolio - see every assignee active in that class. Explore C04B
Ranked #36,341 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Maerz Ofenbau AG against M.C. Dean Inc., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 28.4/100 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.