Overall rank by patents
#49,913
Across all tracked assignees
USPTO 2015–2025 USPTO PatentsView US Corporation
Questech Corporation
USPTO PatentsView assignee record - 5 granted patents across 5 technology areas, active 2015–2023. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. 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).
5
Total patents granted
5
CPC technology areas
8.8
Avg claims per patent
-33%
5-year filing velocity
The verdict
Questech holds 5 US patents across 5 technology areas, rank #49,913 of 50,000 tracked assignees.
- #49,913
- of 50,000 US assignees by volume
- Top 81%
- by Innovation Score (26.0/100)
- 8.8
- avg claims per patent
- -33%
- filing velocity, last 5 yrs
Portfolio overview
Questech Corporation has been granted 5 US utility patents between 2015 and 2023, placing Questech Corporation at rank #49,913 across all assignees tracked by PlainPatent. This portfolio spans 5 distinct Cooperative Patent Classification (CPC) subclasses, averaging 8.8 claims per patent with primary concentration in C04B (LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE ; CERAMICS ; REFRACTORIES; TREATMENT OF NATURAL STONE). As a US Corporation, Questech Corporation is one of the more focused assignees in the PatentsView dataset. By volume, Questech sits between Quanzhou Shenglv Trading Co., Ltd. (5 patents, rank #49,909) and Quickbiz Holdings Limited, Apia (5 patents, rank #49,917) - the closest US assignees by grant volume. The composite Innovation Score of 26.0/100 blends portfolio volume, filing velocity, technology breadth, and claim depth into a single comparable measure drawn directly from USPTO PatentsView records.
Filing cadence tells the strategic story. Between 2020 and 2025 the company received 2 grants, compared with 3 in the 2015–2019 window, a -33% shift in five-year velocity. A cooling filing rate may reflect portfolio consolidation, shifting priorities, or reduced R&D throughput. The US Corporation classification further shapes interpretation, since corporate, government, and individual filers pursue patents for materially different reasons.
Claim depth and technology breadth together indicate competitive posture. Questech Corporation's 8.8 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while concentration in 5 subclasses points to a focused technical program. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Questech Corporation against peers pursuing similar technology classes.
Who files at Questech's volume?
Granted US patents 2015–2025 versus its nearest-ranked assignees by volume, this company marked ◀
- Quanzhou Shenglv…
Quanzhou Shenglv Trading Co., Ltd.
5 patents
- Quark Distribution
Quark Distribution, Inc.
5 patents
- Quest Consultants
Quest Consultants LLC
5 patents
- Quest Photonic De…
Quest Photonic Devices B.V.
5 patents
- Qufora A/S
Qufora A/S
5 patents
- Quib
Quib, Inc.
5 patents
- Quick Heal
Quick Heal Technologies Limited
5 patents
- Quickbiz Holdings…
Quickbiz Holdings Limited, Apia
5 patents
- Questech ◀
Questech Corporation
5 patents
What this shows Questech holds 5 patents at rank #49,913, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.
Companies ranked near Questech
By rank, the assignees closest to #49,913 in granted patent volume.
- Quanzhou Shenglv Trading Co., Ltd. #49,909 · 5 patents
- Quark Distribution, Inc. #49,910 · 5 patents
- Quest Consultants Llc #49,911 · 5 patents
- Quest Photonic Devices B.v. #49,912 · 5 patents
- Qufora A/s #49,914 · 5 patents
- Quib, Inc. #49,915 · 5 patents
- Quick Heal Technologies Limited #49,916 · 5 patents
- Quickbiz Holdings Limited, Apia #49,917 · 5 patents
Leaders in C04B (LIME)
Other assignees with the most granted patents in Questech's primary technology class.
- NGK Insulators, Ltd. 451 in class
- Halliburton Energy Services, Inc. 417 in class
- Saudi Arabian OIL Company 271 in class
- Corning Incorporated 262 in class
- TDK Corporation 164 in class
- Rolls-royce Corporation 135 in class
- United States Gypsum Company 132 in class
- Mitsubishi Materials Corporation 129 in class
Questech's Innovation Score vs. every tracked assignee
Composite of portfolio volume, filing velocity, technology breadth, and claim depth (0–100)
26 Top 81% higher than 19% of 50,000 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
Grants by year
Teal-shaded recent years (2020–present) versus the 2015–2019 baseline. Full figures in the table below.
View data table
| Year | Patents Granted | Share of Period |
|---|---|---|
| 2015 | 2 | 40.0% |
| 2018 | 1 | 20.0% |
| 2020 | 1 | 20.0% |
| 2023 | 1 | 20.0% |
Which technologies does Questech Corporation patent most?
Top 5 of 5 technology areas
Patent Moat Analysis
Portfolio Volume Light
Tech Breadth Focused
Claim Depth Simple
Velocity Declining
Frequently Asked Questions
How many patents does Questech Corporation hold?
Questech Corporation holds 5 US granted patents filed between 2015 and 2023, spanning 5 technology areas.
What is Questech Corporation's Innovation Score?
Questech Corporation has an Innovation Score of 26.0 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).
What technology areas does Questech Corporation focus on?
Questech Corporation'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 3 patents. The company has filed patents in 5 CPC subclasses total.
Is Questech Corporation's patent filing rate increasing or decreasing?
Questech Corporation's recent filing velocity is -33% compared to the prior five-year period. Filing activity has slowed relative to earlier years.
What does claim depth mean for Questech Corporation's patents?
Questech Corporation's patents average 8.8 claims each. This is relatively simple claim structure, typical for focused inventions.
How is the Questech Corporation 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.
How to use this portfolio
Questech's 5 grants land it in the top 81% by Innovation Score, but volume alone doesn't tell you where the strength sits.
- Read that count against the largest US assignees before treating it as dominance - Questech ranks #49,913 of 50,000. Top 50 holders
- Most of this portfolio concentrates in C04B - see who else leads that technology area. C04B leaders
- Check what the four-part Innovation Score actually rewards before comparing it to another company. How the score works
Patent counts and the Innovation Score measure patenting activity, not commercial success or the legal strength of any patent. Many patents are filed defensively. Verify the status of an individual patent against official USPTO records.
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.