Who owns the CBM trademark?

The CBM trademark is owned by Castle Building Materials Inc..

What class is the CBM trademark registered in?

The CBM trademark is registered in Class 006 (Common metals, their alloys & metal goods).

What is the serial number for CBM?

The USPTO serial number for CBM is 99431440.

What is the registration number for CBM?

CBM is registered under USPTO registration number 8251905.

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Updated Nov 2, 2026·10 searches this week

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Section 8 declaration window

May 12, 2032

2017 days remaining

CBM

REGISTERED

Serial: 99431440
Reg: 8251905
Filed: Oct 07, 2025
Owner: Castle Building Materials Inc.

Common metals and their alloys, ores; metal materials for building and construction; transportable buildings of metal; non-electric cables and wires of common metal; small items of metal hardware; metal containers for storage or transport; safes.

What to file next

Section 8 declaration of continued use

When: Due between the fifth and sixth anniversary of registration.
Extensions and grace: A six-month grace period follows, with an added per-class fee.
If it is missed: A missed Section 8 cancels the registration, and there is no revival route for it.

How the Section 8 deadline works

General information about USPTO practice, not legal advice. The register is the authority, and a filing that has not yet posted can change what is owed.