PlainPatent

CPC technology class · B31

B31D - Making Articles OF Paper

Making articles of paper, cardboard or material worked in a manner analogous to paper, not provided for in subclasses b31b or b31c. 747 US utility patents granted 2015–2025, with the leading assignees and year-by-year filing trajectory.

747
US patents granted
B31
Parent CPC class
20
Active assignees
+65%
5-yr velocity

The verdict

Making Articles OF Paper ranks #492 of 670 CPC technology areas - 747 US patents granted since 2015, with filing up 65% over five years.

#492
of 670 CPC technology areas
747
US patents granted, 2015–2025
Pregis Innovative Pac…
leading assignee (74)
+65%
filing velocity, last 5 yrs
Top assignee: Pregis Innovative Packaging Llc (74 patents)

CPC subclass B31D - MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C - covers 747 US utility patents granted between 2015 and 2025 according to USPTO PatentsView records, within the broader CPC class B31 (MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER). See our CPC classification guide for how the system works.

The competitive landscape in B31D is shaped by 20 distinct companies actively filing in this space. Pregis Innovative Packaging Llc leads with 74 patents, followed by Ranpak Corp. at 62 grants and Sealed Air Corporation (us) at 38.

Filing activity in B31D is up 65% over the past five years versus 2015-2019, a sharp acceleration suggesting an emerging or fast-moving technology area. All counts come directly from USPTO PatentsView and reflect US granted utility patents only.

Is B31D innovation accelerating?

US utility-patent grants per year in B31D, 2015–2025 - recent five years are up 65% versus 2015–2019.

405060708090100 20152016201720182019202020212022202320242025 49

Who leads B31D?

The 12 most active assignees in MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C - wider bars mean more grants

patents

What this shows Pregis Innovative Pac… is the most active filer in B31D, holding 74 of the 747 patents in this class. Concentration at the top signals how contestable this technology area is for new entrants.

Source USPTO PatentsView, granted utility patents As of 2015–2025 grant years
View data table
Top patent holders in CPC subclass B31D
Rank Company Patents in B31D
#1 Pregis Innovative Packaging Llc 74
#2 Ranpak Corp. 62
#3 Sealed Air Corporation (us) 38
#4 Sprick Gmbh Bielefelder Papier-und Wellpappenwerke & Co. 18
#5 Automated Packaging Systems, Llc 14
#6 Electronic Imaging Services, Inc. 14
#7 Storopack Hans Reichenecker Gmbh 13
#8 Hexcelpack, Llc 13
#9 Vanguard Packaging, Llc 9
#10 Temperpack Technologies Inc. 7
#11 I.m.a. Industria Macchine Automatiche S.p.a. 6
#12 Bradford Company 6
#13 Smart Planet Technologies, Inc. 6
#14 Documotion Research, Inc. 6
#15 UPM Raflatac OY 5
#16 Ward-kraft, Inc. 5
#17 Pregis Intellipack Llc 5
#18 Rekon, Llc 4
#19 Minigraphics, Inc. 4
#20 BETA (shenzhen) Package Products Co., Ltd 4

About This Class

CPC subclass B31D belongs to class B31.

747 patents were granted in this class between 2015 and 2025.

20 companies actively patent in this space.

Classification System

Cooperative Patent Classification (CPC) is a hierarchical patent classification system used by the USPTO and EPO.

← All Technology Classes Technology Rankings →

Footprint here vs. claim strategy

Each dot is a leading B31D assignee, placed by how many patents it holds in this class (horizontal) against its company-wide average claims per patent (vertical) - a read on whether the class is led by broad-but-shallow filers or focused deep-claim players.

Top 14 B31D assignees by class footprint. Bubble size = patents in B31D. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Top 14 B31D assignees by class footprint. Bubble size = patents in B31D. Source: USPTO PatentsView (claim depth is company-wide across all classes). Scatter plot of 14 data points (bubble-sized by third dimension). 5101520253035 020406080 Patents in B31D Avg claims / patent (company-wide) Pregis Innovative Pac…RanpakSealed Air (Us)Sprick Bielefelder Pa…Automated Packaging S…Imaging ServicesStoropack Hans Reiche…HexcelpackVanguard PackagingTemperpackI M A Industria Macch…BradfordSmart PlanetDocumotion Research
Top 14 B31D assignees by class footprint. Bubble size = patents in B31D. Source: USPTO PatentsView (claim depth is company-wide across all classes).

Frequently Asked Questions

What is CPC class B31D?
CPC subclass B31D covers MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C. It belongs to CPC class B31 (MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER), with 747 US utility patents granted since 2015.
How many patents have been filed in B31D?
747 US utility patents were granted in CPC subclass B31D between 2015 and 2025, based on USPTO PatentsView data.
Which company holds the most patents in B31D?
Pregis Innovative Packaging Llc leads B31D with 74 patents, making it the most active assignee in this technology area.
How is patent data for B31D collected?
Patent data comes from USPTO PatentsView, a public research dataset maintained by the United States Patent and Trademark Office. It covers all US granted utility patents and assigns CPC codes based on the technology described in each patent.
What is the difference between CPC class and subclass?
A CPC class (e.g., B31) is a broad technology category. Subclasses like B31D provide finer granularity within that category. PlainPatent organizes data at the subclass level (4-character codes) for the most useful view of technology domains.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from USPTO PatentsView - official U.S. government patent data. See our methodology for computation details. Retrieved and formatted by PlainPatent Editorial

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.