Thanks.
But I found this guy's experience (He was applying for a green card and his wife got a conditional green card as a dependent):
Myself: EB2 PhD Started process 8/04 TOTAL 3.5 Years
Labor Cert Approved 1/05
I-140 Approved 4/05
I-485 Applied 5/05, EAD/AP 5/05 approved
FP 1 7/05 EAD/AP 3/06 approved RFE 1 6/06 FP 2 10/06
EAD/AP 1/07 approved RFE 7/07
Used AC 21 for I-140 portability <BR>EAD/AP 12/07 approved.
I 485 Approved 2/08 No Interview.
Wife Derivative:
Married 10/07 Applied 11/07 from F-1 visa
FP 01/08 AP/EAD 3/08 I-485 conditionally approved TODAY!!
7/16/08
The marriage must occur before my principal
I485 is approved. Then derivative status is possible.
Interview went only for 20minutes. As marriage is less
than 2 years, conditional. Submitted copies of marraige cert,
bank accounts, credit cards, tax filing, lease contracts,
vacation receipts, health plan copy. Conditional Green card to
remove condition 1.75 years from today ie. 4/15/10. Same
process, submit all 2 name documents on I-751 + $500+ OUCH!!
Immigration officer was professional, no jokes, no
smile, but polite. She asked for A, B, C, docs in sequence,
punch 2 holes and file it. Copies my GC and DL + wife DL, then
"OK, I will approved it conditionally, please submit I-751 in
1.75 years." "welcome to USA".
http://www.immihelp.com/experience/readentries.do?category=3
With marriage immigration works differently in different scenarios.
If somebody is obtaining a green card, and his/her spouse joins him/her as a dependent, they both get unconditional green cards.
But if somebody already has a green card or is a US citizen, then gets married and files for the spouse, the spouse will initially get a conditional green card (unless they have already been married for 2 years before the green card process).