I realize this posting is a couple of years old, but maybe you will see my response. Timothy Allen was my 4th Great-grandfather. Per the 1850 and 1855 census, he was born in Rensselaer Co. NY about 1779. He was listed as one of the earlier Pioneers of Cortland Co. From what I have found, he may have moved their around 1810.
If you read this, and have further information, please contact me at jim at thehaights.org