Unfortunately, floppy disks do deteriorate to the point where they are no longer readable, but this may or may not be the case for you.
If the floppies were created on a Win 95 system or earlier, see this article:
See this http://www.extraparts.info/2014/11/it-quickie-diskprobe-for-windows-7-8-81.html
You can also take a look at this page (even though it's primarily about 5.25 and 8 inch disks) and perhaps try contacting the author for specific advice: http://www.retrotechnology.com/herbs_stuff/s_drives_howto.html
The main page for the site is http://www.retrotechnology.com/herbs_stuff/drive.html