What is Filing Basis Codes?
Standardized codes indicating the legal basis on which a trademark application is filed, such as use in commerce, intent to use, or foreign registration.
Filing basis codes are standardized designations used by trademark offices to identify the legal ground on which a trademark application is filed. At the USPTO, the primary filing bases are codified in the Lanham Act and each carries specific requirements, procedures, and implications for the application's prosecution and the resulting registration. Understanding filing basis codes is essential for trademark practitioners, as the chosen basis affects deadlines, required evidence, and the scope of rights conferred.
The principal USPTO filing bases are: Section 1(a) — use in commerce, indicating the mark is already in use; Section 1(b) — intent to use, indicating a bona fide intention to use the mark in the future; Section 44(d) — foreign application priority, allowing the applicant to claim priority from a pending application in a Paris Convention country; Section 44(e) — foreign registration, based on an existing registration in the applicant's country of origin; and Section 66(a) — extension of protection under the Madrid Protocol, where the U.S. is designated in an international registration filed through WIPO.
An application may be filed on more than one basis. For example, an applicant may claim Section 1(a) for some classes where the mark is already in use and Section 1(b) for other classes where use has not yet begun. The filing basis can also be amended during prosecution — for instance, converting from an intent-to-use basis to a use-in-commerce basis once the mark enters the market. Each basis carries its own set of requirements that must be satisfied before registration can issue.
Why It Matters
The filing basis is not merely a procedural technicality — it fundamentally shapes the trajectory of the application. A Section 1(a) application requires a specimen of use at the time of filing, while a Section 1(b) application defers the use requirement until after the Notice of Allowance. A Section 44(e) application based on a foreign registration does not require proof of use at filing or at registration, though the owner must eventually use the mark in U.S. commerce to maintain the registration.
Filing basis codes also have strategic implications for competitors monitoring the trademark register. An application filed on a Section 1(b) basis signals that the mark is not yet in use — potentially indicating an upcoming product launch or market entry. A Section 66(a) basis indicates an international filing, suggesting a foreign company expanding into the U.S. market. These signals carry competitive intelligence value for brands tracking industry activity.
How Signa Helps
Signa's API returns filing basis information for every trademark application in its database, enabling users to filter and analyze filings by basis code. This capability is valuable for competitive intelligence — tracking how many applications in a given industry are filed on an intent-to-use basis (indicating future launches) versus use-in-commerce (indicating active market participants). It also informs clearance decisions, as the filing basis affects the strength and status of potentially conflicting marks.
Signa's search tools allow users to query applications by filing basis across jurisdictions, identifying patterns such as a surge in Section 66(a) filings in a specific class — which could signal increased international competition in that product category. This data-driven approach to trademark intelligence goes far beyond what manual gazette reviews can provide.
Real-World Example
An IP analytics firm uses Signa's API to build a quarterly report on trademark filing trends in the U.S. health and wellness sector. By filtering applications by filing basis, the firm discovers a 40% increase in Section 1(b) intent-to-use filings in Class 5 (dietary supplements) over the past quarter, while Section 1(a) use-based filings remained flat. This pattern suggests that numerous companies are preparing to launch new supplement brands but have not yet entered the market. The firm shares this intelligence with its clients — established supplement companies — who use it to anticipate competitive launches and prepare brand defense strategies. One client identifies a Section 1(b) filing for a mark confusingly similar to its own and begins preparing an opposition, acting months before the competitor's product ever reaches store shelves.