Company Analysis
Sign in

Perma-Pipe International Holdings, Inc. (PPIH)

Nasdaq: PPIH · Industrial & Commercial Fans & Blowers & Air Purifing Equip · The Woodlands, TX · filing with the SEC since 1994
Full chart Alerts Compare
Grade4.3
◀ Past 3.1● Present 4.2▶ Future 5.8
OverviewBusinessFinancialsGradeForecastSentimentOwnershipPeopleFilingsPatents Chart

Patents

US patents through Dec 31, 2025 · PatentsView, from the USPTO’s Open Data Portal · read Oct 27, 2026

7 patents granted to the 3 names below, as the owner printed on each patent when it was granted. A later sale, a lapse or an expiry is not read, so this is what was granted to Perma-Pipe International Holdings, Inc.’s names, not what it holds today.

Patents granted
7
7 utility, 1976 to Dec 31, 2025
Granted in 2025
1
in the last year the record reads
Applications published
6
since 2001, to Dec 31, 2025
Names they are printed under
3
a subsidiary
By yearGrantedApplications published
'94'95'08'09'10'11'15'16'22'25
Each pair is one calendar year. Applications are published about eighteen months after filing, so the newest years read low.
What they are aboutgrants since 2021
Other special machines1
The main technology area of each patent, in the World Intellectual Property Organization’s 35 fields.
Under which name3 counted
PERMA-PIPE, INC. a subsidiary
US, as the owner printed on each patent
7 granted
3 published
PERMA-PIPE, INC. a subsidiary
named as the applicant on its applications, in US
0 granted
2 published
MIDWESCO FILTER RESOURCES, INC. a subsidiary
US, as the owner printed on each patent
0 granted
1 published
Newest grantseach row opens the USPTO’s own copy
GrantedPatentTitleFieldOwner as printed
Apr 15, 202512,276,366System and method for producing spray foam insulated pipe with channels, tubes or conduitsOther special machinesPERMA-PIPE, INC.
Sep 29, 20159,145,999Shear increasing systemMechanical elementsPERMA-PIPE, INC.
Nov 1, 20118,049,638Sensor for detecting hydrocarbonsMeasurementPERMA-PIPE, INC.
Nov 2, 20107,824,595Method and system for cast molding a fluid conduitOther special machinesPERMA-PIPE, INC.
Apr 28, 20097,525,444Sensor for detecting hydrocarbonsMeasurementPERMA-PIPE, INC.
Apr 25, 19955,410,255Method and apparatus for detecting and distinguishing leaks using reflectometry and conductivity testsMeasurementPERMA-PIPE, INC.
Oct 18, 19945,355,720Corrosion resistant cableMeasurementPERMA-PIPE, INC.
Newest applications publishedan application is a clue, never a plan
PublishedApplicationTitleFieldOwner as printed
Nov 3, 20222022/0349512SYSTEM AND METHOD FOR PRODUCING SPRAY FOAM INSULATED PIPE WITH CHANNELS, TUBES OR CONDUITSOther special machinesPERMA-PIPE, INC. · patent 12,276,366 granted from it
Jan 7, 20162016/0003405SHEAR INCREASING SYSTEMMechanical elementsPERMA-PIPE, INC.
Jun 23, 20112011/0146830Shear Increasing SystemMechanical elementsPERMA-PIPE, INC. · patent 9,145,999 granted from it
Feb 24, 20112011/0041588SENSOR FOR DETECTING HYDROCARBONSMeasurementPERMA-PIPE, INC. · patent 8,049,638 granted from it
Oct 16, 20082008/0250762Dust Collector Tube Line CleanerEnvironmental technologyMIDWESCO FILTER RESOURCES, INC.
Mar 27, 20082008/0072988Glass Syntactic Polyurethane Insulated ProductMechanical elementsPERMA-PIPE, INC.

A patent is counted where the owner printed on it when it was granted carries the company’s own name, a former name, the name of a subsidiary its annual report lists, or its own name with a patent-holding phrase (Technology Licensing, Intellectual Property and the like), once the legal form, case and punctuation are set aside, and prints a country that name counts in. PatentsView’s data are published under the Creative Commons Attribution 4.0 licence. Source: PatentsView's granted patents and pre-grant publications, disambiguated, from the USPTO's Open Data Portal, through Dec 31, 2025, read Oct 27, 2026.

SI Assistanton PPIH · research, not advice