USPTO trademark

K

AllowedUSPTOWord and designClass 5

"K" is a word and design mark owned by Korsana Biosciences, Inc., filed at the USPTO on February 12, 2026. It has been allowed and covers class 5 (Pharmaceuticals).

Get this data via the API
Official USPTO record
K trademark as filed
As filed with the USPTO
Status
Allowed
Since October 6, 2026
Filed
February 12, 2026
Registered
Not yet
Expires
Not recorded
Application no.
99649044
Registration no.
Not yet
Office
USPTO
United States Patent and Trademark Office
Mark type
Word and design
1 class
Ownership

Who owns K

The owner and representative on file with the office.

Owner

Korsana Biosciences, Inc.

Waltham, United States

Representative

Nicole Kinsley

Foley Hoag LLP

Goods and services

What the mark covers

The products and services K is filed for, grouped by Nice class.

  • Antibodies for therapeutic purposes; House mark for pharmaceuticals for the treatment of neurological and neurodegenerative diseases and disorders; Pharmaceutical preparations for the treatment of neurological and neurodegenerative diseases and disorders

History

What has happened so far

Steps recorded by the USPTO, newest first.

  1. Noa e-mailed - sou required from applicant
  2. Official gazette publication confirmation e-mailed
  3. Published for opposition
  4. Notification of notice of publication e-mailed
  5. Approved for pub - principal register
  6. Teas/email correspondence entered
  7. Correspondence received in law office
  8. Teas response to office action received
  9. Notification of non-final action e-mailed
  10. Non-final action e-mailed

6 earlier steps on the official record.

FAQ

About K

Who owns the trademark "K"?

The USPTO trademark "K" (application 99649044) is owned by Korsana Biosciences, Inc.

What is the status of "K"?

Its status at the USPTO is: allowed.

API

Get this data via the API

Everything on this page comes from the Signa API. Pull K and marks like it into your own product with one request.

  • GET/v1/trademarks/{id}

    The full record: owners, classes, dates and images

  • GET/v1/trademarks/{id}/events

    Every step in the office history

  • GET/v1/proceedings?trademark_id={id}

    Oppositions and cancellations against the mark

Get API keyView docs
GET /v1/trademarks/{id}
ID=tm_019d2ba4-7e8c-7449-a539-28d64cf994c6
curl https://api.signa.so/v1/trademarks/$ID \
  -H "Authorization: Bearer $SIGNA_API_KEY"
Response
{
  "id": "tm_019d2ba4-7e8c-7449-a539-28d64cf994c6",
  "object": "trademark",
  "mark_text": "K",
  "status": {
    "primary": "pending",
    "stage": "allowed"
  },
  "office_code": "US",
  "application_number": "99649044",
  "filing_date": "2026-02-12",
  "nice_classes": [
    5
  ],
  "owners": [
    {
      "name": "Korsana Biosciences, Inc.",
      "entity_id": null
    }
  ]
}