US 11653182

US patent 11653182B2, titled "Server that sends a response when a mobile phone has an active status with a packet switched message service," was issued to Rembrandt Messaging Technologies LP. The inventor is Graham Merrett. The application was filed on October 4, 2022, and the patent was granted on May 16, 2023. The priority date for the patent is July 24, 2007.

Abstract:
The patent describes a system comprising a sending mobile phone that can transmit Short Message Service (SMS) messages via a cellular network and packet switched messages through a Packet Switched Message Service (PSMS). The system also includes at least one server supporting the PSMS, which maintains status information and queues messages for later delivery. The system determines the appropriate message type (SMS or PSMS) based on whether the recipient is a PSMS subscriber and their active status. If a recipient is not a PSMS subscriber, an SMS is sent. If a recipient is a PSMS subscriber and has an active status, a packet switched message can be sent, even if the recipient is not currently connected to the server, in which case the message is queued. The PSMS is defined as a service for sending and receiving packet switched messages other than SMS, Enhanced Message Service (EMS), and Multimedia Message Service (MMS). Notably, both SMS and packet switched message content are displayed by the same messaging application on the sending mobile phone.

Plain-Language Overview of Independent Claims:

• Claim 1 (System Claim): This claim describes a system involving a sending mobile phone and at least one server. The mobile phone sends information about a first recipient's phone number to the server. If the first recipient is not a PSMS subscriber, the server sends a first response, and the sending phone then sends an SMS to the first recipient. For a second recipient, the mobile phone sends their phone number to the server. If the second recipient is a PSMS subscriber and has an active status, the server sends a second response. Following this, the sending phone transmits a packet switched message to the second recipient via WLAN and the PSMS, even if the second recipient is not connected to the server at that moment. The server queues this packet switched message until the second recipient connects. The PSMS specifically excludes SMS, EMS, and MMS messages, and both SMS and packet switched message content are displayed by the same messaging client.

• Claim 17 (Method Claim by Sending Mobile Phone): This claim outlines a method performed by a sending mobile phone. It involves authenticating the phone with the PSMS. The phone sends information about a first recipient's phone number to a PSMS server. If the first recipient is not a PSMS subscriber, the phone receives a first response and then sends an SMS to that recipient. For a second recipient, the phone sends their number to the server. If the second recipient is a PSMS subscriber and has an active status, the phone receives a second response, and then sends a packet switched message to them via WLAN and the PSMS. The second response conveys different information than the first. The PSMS is defined as excluding SMS, EMS, and MMS, and both the SMS and packet switched messages originate from the same messaging client.

• Claim 22 (Method Claim by Sending Mobile Phone with Third Response): This method claim, also performed by a sending mobile phone, is similar to Claim 17 but introduces a third scenario. It includes sending first information for a first recipient (non-subscriber, results in SMS) and second information for a second recipient (subscriber, active status, results in packet switched message). Additionally, it describes sending third information for the second recipient, where, if the second recipient is a PSMS subscriber but has an inactive status, the phone receives a third response and then sends an SMS to the second recipient. Crucially, the second response communicates different information than the third response. The content of all messages (SMS to first recipient, packet switched to second, and SMS to second) is displayed by the same messaging application client, and the PSMS routes some messages between subscribers via email addresses.

• Claim 25 (Method Claim by Messaging Client with Third Response): This claim details a method performed by a messaging client. It starts with the messaging client retrieving a destination address from a first message (first receiving mobile phone's number). First information is sent to a PSMS server, and if the first receiving mobile phone is not a PSMS subscriber, a first response is received, leading to the first message being sent as an SMS. The messaging client then retrieves a destination address from a second message (second receiving mobile phone's number). Second information is sent to the server, and if the second receiving mobile phone is a PSMS subscriber and has an active status, a second response is received, leading to the second message being sent as a packet switched message via WLAN and the PSMS. A third scenario is included where third information for the second receiving mobile phone is sent, and if the second receiving mobile phone is a PSMS subscriber but has an inactive status, a third response is received, leading to an SMS being sent to the second receiving mobile phone. The second response communicates different information than the third response. The content of the SMS to the first phone, the second message, and the SMS to the second phone are all displayed by the same messaging client.

I do not have authoritative information from CAFC 2026 dockets through direct database access. However, I can perform a web search for litigation related to US11653182B2.

Litigation Information:
According to Google Patents, the family of US11653182B2 has litigation.

• A US case was filed in the Texas Western District Court.
• A PTAB case, IPR2025-01488, was filed (and noted as "Not Instituted - Procedural").

Please note that direct access to the full details of these dockets (e.g., specific dates within 2026, parties involved in the CAFC for 2026, or the current status of the Texas Western District Court case beyond its filing) is beyond the scope of this search given the available tools and explicit instruction to not auto-correct IDs.## US Patent 11653182: Server that sends a response when a mobile phone has an active status with a packet switched message service

Title: Server that sends a response when a mobile phone has an active status with a packet switched message service
Assignee: Rembrandt Messaging Technologies LP
Inventors: Graham Merrett
Filing Date: October 4, 2022
Issue Date: May 16, 2023

Abstract:
The patent describes a system and method for a mobile phone to send messages using either Short Message Service (SMS) via a cellular network or a Packet Switched Message Service (PSMS). A server supports the PSMS, maintains recipient status, and queues messages. When a sending mobile phone attempts to send a message, it first checks with the server if the recipient is a PSMS subscriber. If the recipient is not a PSMS subscriber, the server responds accordingly, and the sending phone transmits the message as an SMS. If the recipient is a PSMS subscriber and has an "active status," the server sends a different response, allowing the sending phone to send a packet switched message via a Wireless Local Area Network (WLAN) and the PSMS. Critically, packet switched messages can be sent even if the recipient is not currently connected to the server, in which case the message is queued for later delivery. The PSMS is defined as a messaging service distinct from SMS, Enhanced Message Service (EMS), and Multimedia Message Service (MMS). A key feature is that a single messaging application on the sending mobile phone displays the content of both SMS and packet switched messages.

Plain-Language Overview of Independent Claims:

• Claim 1 (System): This claim defines a messaging system. It includes a mobile phone that can send both traditional SMS messages over a cellular network and advanced packet switched messages via a Packet Switched Message Service (PSMS). The system also has at least one server that manages the PSMS and keeps track of user availability and message queues. When the sending phone tries to send a message:

  • If the recipient is not a subscriber to the PSMS, the server tells the sending phone, which then sends a standard SMS.
  • If the recipient is a PSMS subscriber and is "active" (meaning they are able to receive messages via PSMS), the server signals this to the sending phone. The sending phone then sends a packet switched message through a WLAN and the PSMS. This packet switched message can be sent even if the recipient's phone isn't currently connected to the server, in which case the server holds the message until the recipient connects.
  • The PSMS explicitly excludes SMS, EMS, and MMS messages.
  • Importantly, both the SMS and the packet switched messages appear within the same messaging application on the sending phone.

• Claim 17 (Method by Sending Mobile Phone): This claim describes the actions performed by the sending mobile phone itself. The phone first authenticates its own number with the PSMS. It then queries the PSMS server about a first recipient's phone number. If the server indicates the first recipient is not a PSMS subscriber, the phone receives a specific response and proceeds to send an SMS. For a second recipient, if the server indicates they are a PSMS subscriber and have an "active status," the phone receives a different response and sends a packet switched message via WLAN and the PSMS. The responses from the server are different depending on the recipient's PSMS subscription and status. Like the system claim, the PSMS is defined to exclude SMS, EMS, and MMS, and all messages originate from the same messaging client.

• Claim 22 (Method by Sending Mobile Phone with Inactive Status Handling): This claim expands on the previous method by a sending mobile phone to include handling for inactive PSMS subscribers. It follows the steps of Claim 17 for both non-subscribers (resulting in SMS) and active PSMS subscribers (resulting in packet switched messages). Additionally, it describes a scenario where the sending phone queries the server about a second recipient, and if the server identifies them as a PSMS subscriber but with an inactive status, the phone receives a third response, after which it sends an SMS to that (inactive) second recipient. The second response (for an active PSMS subscriber) provides different information than the third response (for an inactive PSMS subscriber). The content of all messages—the SMS to the first non-subscriber, the packet switched message to the active PSMS subscriber, and the SMS to the inactive PSMS subscriber—are all displayed by the same messaging application client. This claim also specifies that the PSMS can route messages using email addresses between subscribers.

• Claim 25 (Method by Messaging Client with Inactive Status Handling): This claim outlines a method as performed by the messaging client application on the sending mobile phone. It details the process of the messaging client retrieving destination addresses and sending information to the PSMS server. Similar to Claim 22, it covers three scenarios:

  • Sending an SMS to a non-PSMS subscriber after receiving a first response.
  • Sending a packet switched message via WLAN and PSMS to an active PSMS subscriber after receiving a second response.
  • Sending an SMS to an inactive PSMS subscriber after receiving a third response.
    The second response for an active subscriber provides different information than the third response for an inactive subscriber. The key element is that the messaging client displays the content of all these different message types within a single interface.

Litigation:
The patent family of US11653182B2 is currently involved in litigation.

• A US case has been filed in the Texas Western District Court.
• A PTAB case, IPR2025-01488, was filed but was "Not Instituted - Procedural."
  I do not have authoritative information on specific CAFC 2026 dockets for this patent number.