SQL Server – grab part of string after a value sequence

I have a table called Note with a column named Notes.

Notes
------
{rtf1ansideff0{fonttbl{f0fnilfcharset0 Arial;}}
viewkind4uc1pardlang1033fs20 called insurance company they are waiting to hear from the claimant's attorney

It has font info in the beginning which I don’t need. I’ve created a new column name final_notes and would like to grab everything after the “fs” plus two characters. The final result would be

final_notes
-----------
 called insurance company they are waiting to hear from the claimant's attorney

Answer

We use PATINDEX to find the first occurrence of fs followed by two digits.

We null it out if we get a 0 i.e. we cannot find the string.

SUBSTRING(Note, NULLIF(PATINDEX('%fs[0-9][0-9]%', Note), 0) + 4, LEN(Note))