OK, just checked. I was correct. Also, on Windows 8.1, need to search for IPv4 Address.
 Code:
ipconfig | findstr /c:"IPv4 Address" > ip.txt
set /p ip=< ip.txt
for /f "tokens=2 delims=:" %%a in ("%ip%") do set ipn=%%a
for /f "tokens=* delims= " %%a in ("%ipn%") do set ipnum=%%a
for /f "tokens=1,2,3,4 delims=." %%a in ("%ipnum%") do set ip1=%%a&set ip2=%%b&set ip3=%%c&set ip4=%%d
echo %ipnum%
echo "ip1=%ip1%"
echo "ip2=%ip2%"
echo "ip3=%ip3%"
echo "ip4=%ip4%"
This worked on Windows 8.1

Regards