TREASURIES-Prices fall after Fed holds interest rates steady

* No tweak to Fed's "extended period" low-rate pledge

* Treasury to sell $81 billion in notes, bonds next week (Adds economist's quotes, updates prices)

NEW YORK, Nov 4 (Reuters) - Longer-dated U.S. Treasury debt prices fell on Wednesday after the Federal Reserve said it would hold interest rates steady near zero and reiterated rates would remain low for an "extended" period.

With the Fed statement out of the way, investors turned their attention back to the pending sale of $81 billion in Treasury notes and bonds next week. Investors often move to cheapen Treasuries ahead of such auctions.

"The Fed just kicked the can down to the next meeting, which will now probably be when they remove the 'extended period' language," said John Canally, economist at LPL Financial in Boston.

Benchmark 10-year notes US10YT=RR were trading 22/32 lower in price to yield 3.55 percent, up from 3.47 percent late on Tuesday, while 30-year bonds US30YT=RR were 1-16/32 lower to yield 4.42 percent from 4.33 percent.

This widened the spread between yields on two-year and 10-year notes, taking the Treasury yield curve to its steepest since late July. (Reporting by Chris Reese and Ellis Mnyandu; Editing by James Dalgleish)