How are SIRs published and numbered?

According to the MPEP, SIRs are published and numbered as follows:

• Published SIRs are sequentially numbered in a separate “H” series, starting with number “H1”.
• A notice of the publication of each statutory invention registration is published in the Official Gazette.
• The SIR is mailed to the requester at the correspondence address provided.

The MPEP states: Published SIRs are sequentially numbered in a separate “H” series, starting with number “H1”.

To learn more:

• SIR publication
• SIR numbering
• Official Gazette
• H series