Wait several months and then request your criminal history from the Department of Criminal Justice Services (costs some money) and see if your "rap sheet" has this on it. If it does, with no disposition, demand that it be removed as there is no basis to keep it on there if there are no prints or photos. I assume prints were taken, and if the case was dismissed, the prints and photos are to be destroyed or returned. If it never got that far, i.e. you were "unarrested" then it is unlikely that there is anything at all on your record, but you may wish to follow the procedure to satisfy yourself.
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It seals automatically.
I am a former federal and State prosecutor and now handle criminal defense and personal injury/civil rights cases. Feel free to check out my web site and contact me at (212) 577-9797 or via email at Eric@RothsteinLawNY.com. I was named to the Super Lawyers list as one of the top attorneys in New York for 2012. No more than 5 percent of the lawyers in the state are selected by Super Lawyers. The above answer is for informational purposes only and not meant as legal advice.
If the case was dismissed as you said just a short time after your arrest, it should already be sealed. As suggested above you might want to check your record after a few months just to be sure.
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