DUO-CHEK holds 1 USPTO trademark filings across 6 NICE classes. The largest concentration is in Class 6 (Metal Goods) with 1 filings. The WikiTrademarks Expansion Score is 0/100, low — the brand is focused on defending its existing categories rather than expanding.
USPTO data refreshed July 24, 2026
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Filing Velocity (24 Months)
Nice Class Distribution
Activity Timeline
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Recent Filings
| Serial No. | Mark | Filing Date | Status | Classes | Owner |
|---|---|---|---|---|---|
| 72212558 | DUO-CHEK | Feb 23, 1965 | Abandoned | 006 Metal Goods 007 Machinery 011 Lighting & HVAC 017 Rubber & Insulation 020 Furniture 021 Housewares | CRANE CHEMPHARMA & ENERGY CORP. |
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FAQ: DUO-CHEK trademark portfolio
What trademarks does DUO-CHEK hold?
DUO-CHEK holds 1 USPTO trademark filings across 6 NICE classes. The largest concentration is in Class 6 (Metal Goods), Class 7 (Machinery), Class 11 (Lighting & HVAC). The most recent filings are registered to CRANE CHEMPHARMA & ENERGY CORP..
How many trademarks does DUO-CHEK have at the USPTO?
WikiTrademarks tracks 1 USPTO trademark filings attributed to DUO-CHEK. The brand has been actively filing since February 1965. The count updates daily as new filings are indexed from the USPTO bulk data feed.
In which NICE classes does DUO-CHEK file most often?
DUO-CHEK's most active class is NICE Class 6 (Metal Goods), with 1 filings. The full distribution across all 6 classes is shown in the Nice Class Distribution panel on this page.
Who owns the DUO-CHEK trademark?
The most recent filings under the DUO-CHEK mark are registered to CRANE CHEMPHARMA & ENERGY CORP.. Trademark ownership can shift through assignments — see the Ownership & Assignment History section on this page for the full chain of title.
Is DUO-CHEK expanding into new categories?
The current WikiTrademarks Expansion Score for DUO-CHEK is 0 out of 100, which is low — the brand is focused on defending its existing categories rather than expanding. The score combines NICE class breadth, filing velocity, and the rate of cross-class movement from the brand's filing history.
How can I track new DUO-CHEK trademark filings?
Click the Watch Brand button at the top of this page to add DUO-CHEK to your Watchlist. New filings show up on your WikiTrademarks dashboard within 24 to 48 hours of being public, alongside any class expansions, status changes, or assignment events.
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