DYSTOR

What this means for you

Registered since 21 May 1991. The owner can stop confusingly similar uses in the classes it covers; it stays on the register as long as the owner keeps up the maintenance filings (next due by 21 May 2021).

Record

Serial number

74070477

Registration number

1644971

Mark type

Word mark

Filed

18 Jun 1990

Published for opposition

26 Feb 1991

Registered

21 May 1991

Next maintenance due

21 May 2021

Attorney of record

Gary C. Ganzi

Goods and services

• Class 007 — Machines and machine tools: gas storage machines
• Class 020 — Furniture: rubber and plastic containers for commercial gas storage

Owner

• EVOQUA WATER TECHNOLOGIES LLC, Tewksbury, MA, US
• SIEMENS WATER TECHNOLOGIES LLC, ALPHARETTA, GA, US
• SIEMENS INDUSTRY, INC., ALPHARETTA, GA, US
• SIEMENS WATER TECHNOLOGIES HOLDING CORP., WARRENDALE, PA, US
• USFILTER CORPORATION, LOWELL, MA, US
• UNITED STATES FILTER CORPORATION, PALM DESERT, CA, US
• Envirex Inc., Waukesha, WI, US
• Envirex Inc., Waukesha, WI, US
• Envirex Inc., Waukesha, WI, US

Prosecution history

• 10 Nov 2025 — TEAS CHANGE OF CORRESPONDENCE RECEIVED
• 10 Nov 2025 — ATTORNEY/DOM.REP.REVOKED AND/OR APPOINTED
• 10 Nov 2025 — TEAS REVOKE/APP/CHANGE ADDR OF ATTY/DOM REP RECEIVED
• 10 Nov 2025 — APPLICANT/CORRESPONDENCE CHANGES (NON-RESPONSIVE) ENTERED
• 10 Nov 2025 — TEAS CHANGE OF OWNER ADDRESS RECEIVED
• 08 Apr 2024 — TEAS CHANGE OF CORRESPONDENCE RECEIVED
• 08 Apr 2024 — ATTORNEY/DOM.REP.REVOKED AND/OR APPOINTED
• 08 Apr 2024 — TEAS REVOKE/APP/CHANGE ADDR OF ATTY/DOM REP RECEIVED
• 17 Feb 2022 — TEAS CHANGE OF CORRESPONDENCE RECEIVED
• 17 Feb 2022 — ATTORNEY/DOM.REP.REVOKED AND/OR APPOINTED
• 17 Feb 2022 — TEAS REVOKE/APP/CHANGE ADDR OF ATTY/DOM REP RECEIVED
• 12 May 2021 — ASSIGNMENT OF OWNERSHIP NOT UPDATED AUTOMATICALLY
• 14 Apr 2021 — ASSIGNMENT OF OWNERSHIP NOT UPDATED AUTOMATICALLY
• 15 Oct 2020 — NOTICE OF ACCEPTANCE OF SEC. 8 & 9 - E-MAILED
• 15 Oct 2020 — REGISTERED AND RENEWED (THIRD RENEWAL - 10 YRS)