Intellectual property

Patents and trade marks

The designs, patents and marks that protect the Duryn One and its cartridge system, listed so anyone can check them. We add to this page as applications grant and remove rights when they end.

Last updated 2 September 2026 Rights holder See the store legal notice

Notice. This page is provided to give public notice of the patents and registered designs that cover Duryn products, in accordance with the virtual marking provisions of 35 U.S.C. § 287(a) (United States) and section 62(1) of the Patents Act 1977 (United Kingdom). Duryn products and their packaging are marked with the address of this page instead of individual patent numbers. The table under each product below associates that product with the rights that cover it.

Products marked Patent pending are the subject of one or more pending patent applications listed here. A pending application is not a granted patent. Rights listed as lapsed or expired no longer apply and are kept on this page for a period only so that older products can be traced.

Pat. duryn.com/patents

Which rights cover which product

One product, one list. This is the association the marking statutes ask for.

Duryn One water filter pitcher

Glass body, stainless steel funnel, walnut lid.

  • United States · Design Available on request Granted
  • European Union · Design Available on request Registered
  • United Kingdom · Design Available on request Registered

Click-in cartridge system

The plastic-free cartridge and the mount it clicks into.

  • United States · Design Available on request Granted
  • European Union · Design Available on request Registered
  • India · Design Available on request Registered
  • International (PCT) · Patent Available on request Pending
  • United States · Patent Available on request Pending
  • Europe (EPO) · Patent Available on request Pending

Clean, Alkaline and Softener cartridges

Replacement cartridges for the Duryn One.

  • United States · Design Available on request Granted
  • European Union · Design Available on request Registered
  • India · Design Available on request Registered
  • International (PCT) · Patent Available on request Pending
  • United States · Patent Available on request Pending
  • Europe (EPO) · Patent Available on request Pending

Registered designs and design patents

Design rights protect how the Duryn One and its cartridge look. A design patent (US) or registered design (EU, UK, India) covers the ornamental shape, not the way it works.

Registered designs and design patents
Title Jurisdiction Number Covers Status Granted Verify in official register
Water filter pitcher (ornamental design) United States USPTO Available on request Duryn One water filter pitcher Granted See official register
Water filter pitcher European Union EUIPO Available on request Duryn One water filter pitcher Registered See official register
Water filter pitcher United Kingdom UK IPO Available on request Duryn One water filter pitcher Registered See official register
Filter cartridge and mount United States USPTO Available on request Click-in cartridge system, Clean, Alkaline and Softener cartridges Granted See official register
Filter cartridge and mount European Union EUIPO Available on request Click-in cartridge system, Clean, Alkaline and Softener cartridges Registered See official register
Filter cartridge and mount India Indian Patent Office (Designs) Available on request Click-in cartridge system, Clean, Alkaline and Softener cartridges Registered See official register

Utility patents

Utility patents protect how something works. The applications below cover the click-in, plastic-free cartridge system. Until they grant, products carry the marking “Patent pending”.

Utility patents
Title Jurisdiction Number Covers Status Filed Verify in official register
Plastic-free gravity filter cartridge and click-in mounting system International (PCT) WIPO Available on request Click-in cartridge system, Clean, Alkaline and Softener cartridges Pending See official register
Plastic-free gravity filter cartridge and click-in mounting system United States USPTO Available on request Click-in cartridge system, Clean, Alkaline and Softener cartridges Pending See official register
Plastic-free gravity filter cartridge and click-in mounting system Europe (EPO) EPO Available on request Click-in cartridge system, Clean, Alkaline and Softener cartridges Pending See official register

Trade marks

The names and symbols that identify Duryn. ® is used only where a mark is registered; ™ marks a name we claim as ours while an application is pending.

Trade marks
Mark Jurisdiction Number Classes Status Registered Verify in official register
duryn (word mark) European Union EUIPO Available on request See official register Registered See official register
duryn (word mark) United Kingdom UK IPO Available on request See official register Registered See official register
duryn (word mark) United States USPTO Available on request See official register Pending Not published
GravityPlus (word mark) European Union EUIPO Available on request See official register Pending Not published
Duryn One (word mark) European Union EUIPO Available on request See official register Pending Not published

Using our names and marks

For press, retailers, affiliates and anyone writing about the product.

Write “Duryn” or “duryn”

The brand is written in lower case in the logo and either way in text. Never “DURYN” or “Duryn®” in running copy; the ® belongs on the mark itself, and only in the countries where it is registered.

“Duryn One” is the pitcher

The product is the Duryn One; the cartridges are the Duryn Clean, Alkaline and Softener cartridges. GravityPlus™ is the name of the carbon-block filtration system, not a product.

Ask before you use the logo

Retailers and affiliates get logo files and product photography from our press kit; use them unaltered. Do not combine the logo with another brand's name or mark.

Compatible does not mean Duryn

No third-party cartridge fits the Duryn One, and no one is licensed to make one. A product described as “Duryn-compatible” is not ours, and we would like to hear about it.

Changes to this page

Every addition and removal, dated. Earlier versions are available on request.

  1. Page created. Rights information added; official registration and application details are available on request.

Licensing, questions and copies

For licensing enquiries, to report a copy of a Duryn product, or to request an earlier version of this page, use the contact form.

Copyright and ownership information for the content and design of duryn.com is stated in the store legal notice. Registered and pending rights are listed above for notice purposes. Third-party certification and laboratory names remain the marks of their respective owners, and their use here does not imply endorsement. This page is not legal advice and does not describe the full scope of any right. Official registers are the authoritative source for current status.