US 11192568

Here's a concise summary of US Patent 11192568, "Removable seat attachment for a stroller":

Title: Removable seat attachment for a stroller

Assignee:

• Current: Baby Jogger Ii LLC
• Original: Baby Jogger LLC

Inventors: Jon Hee Lee, Megan Roe, Stacy Noel Simpson, Mark Zehfuss

Filing Date: March 27, 2020 (for application number US16/832,429)

Issue Date: December 7, 2021

Abstract:
A stroller is described with the capability to removably attach and detach a second seat as needed. The stroller includes a frame, front and rear wheels, and a first seat. It also features two seat attachment housings, each having a top opening and an adapter receiving cavity for a corresponding seat attachment adapter. These cavities are open to the environment at their bottom side. Each housing is equipped with a sliding or rotating door that can be moved to expose or cover the opening and cavity when a second seat is not in use. Seat attachment adapters can be coupled to these housings, and a second seat can then be coupled to the adapters.

Plain-Language Overview of Independent Claims:

• Claim 1: This claim describes a stroller system designed to be convertible from a single to a double stroller. It includes the main stroller frame, front and rear wheels, and a primary seat. Key to this claim are two distinct seat attachment housings (one on each side of the stroller frame). Each housing has an opening on its top surface and a cavity inside to accept a seat attachment adapter. A notable feature is that this cavity is open to the environment at its bottom. Additionally, each housing is equipped with a sliding door that can be moved between a closed position (covering the opening) and an open position (exposing the opening and cavity).

• Claim 9: Similar to Claim 1, this claim also describes a convertible stroller system with a frame, wheels, and a first seat. It specifies two seat attachment housings, each with a top opening and an adapter receiving cavity that is open to the environment at the bottom. The distinguishing feature in this claim is that each housing includes a rotating door (instead of a sliding door as in Claim 1) that can move from a closed to an open position to reveal the opening and cavity.

• Claim 17: This claim describes a method for converting a single stroller into a double stroller. The method starts with providing a stroller that has the features outlined in Claim 1 or 9 (frame, wheels, first seat, and two seat attachment housings each with a door, top opening, and a bottom-open adapter receiving cavity). The steps of the method involve:

  1. Moving the first door from its closed to its open position.
  2. Inserting the first end of a first seat attachment adapter into the first housing's cavity.
  3. Moving the second door from its closed to its open position.
  4. Inserting the first end of a second seat attachment adapter into the second housing's cavity.
  5. Finally, attaching a second seat to the second ends of both inserted seat attachment adapters.

USPTO and CAFC 2026 Dockets Search:
A search of USPTO and CAFC 2026 dockets for patent number 11192568 does not show specific results for this patent number within CAFC 2026 dockets. However, the patent's information page itself indicates the following litigation activity:

• US cases were filed in Delaware District Court (1:24-cv-00723 and 1:24-cv-00725) in 2024.
• A US case was filed in Massachusetts District Court (1:24-cv-11582) in 2024.
• A PTAB case (IPR2025-01100) was filed in 2025, with a status of "Not Instituted - Procedural".
• The first worldwide family litigation has been filed.
  The general 2026 CAFC dockets show various patent-related opinions and summaries, but none are specifically tied to US11192568.