It could take several months and the USCIS may forward the I-485 to a local office for an interview. Consult with an immigration attorney for further guidance.
A few months
(213) 394-4554 x0 Mr. Shusterman is a former INS Trial Attorney (1976-82) with over 35 years of immigration experience. His response to your question is general in nature, as not all the facts are known to him. You should retain an attorney experienced in immigration law to review all the facts in your case in order to receive advice specific to your case. Mr. Shusterman's statement above does not create an attorney/client relationship.
Estimated processing times are listed on www.uscis.gov. You are in a good company of many. Like them, you have three options: 1. continue waiting. 2. make an inforpass and try to follow up. 3. hire an experienced immigration attorney locally.
NYC EXPERIENCED IMMIGRATION ATTORNEYS www.myattorneyusa.com; email: firstname.lastname@example.org; Phone: (866) 456-8654; Fax: 212-964-0440; Cell: 212-202-0325. The information contained in this answer is provided for informational purposes only, and should not be construed as legal advice on any subject matter.