Amendment Letter Extending Maturity Date of Unsecured Promissory Note Between Biovest International, Inc. and Dennis L. Ryll, M.D.

Summary

This agreement is between Biovest International, Inc. and Dennis L. Ryll, M.D. It extends the maturity date of a $46,015.10 unsecured promissory note originally due on November 30, 2007. With this amendment, the note is now due and payable in full on May 31, 2008. Both parties have agreed to this extension by signing the letter. No other terms of the original note are changed.

EX-10.227 14 dex10227.htm AMENDMENT LETTER Amendment Letter

Exhibit 10.227

December 17, 2007

Via email: ***@*** and

***@***

Dennis L. Ryll, M.D.

1029 Speckledwood Manor Court

Chesterfield, MO 63017

RE:	Biovest International, Inc. – $46,015.10 Loan [Pulaski Interest]

Dear Dennis:

As you know Biovest’s Unsecured Promissory Note to your order dated October 1, 2007 in the principal amount of $46,015.10 (the “Note”) matured on November 30, 2007. Biovest wishes to request your indulgence and consent to extend the maturity date of the Note from November 30, 2007 to May 31, 2008.

If you are in agreement with this extension of the maturity date, please so indicate by signing where indicated below and return to us as soon as possible.

If you have any questions, please call. Thank you.

Sincerely,

/s/ James A. McNulty

James A. McNulty, CPA

Tel: 813 ###-###-####

Email: ***@***

EXTENSION OF UNSECURED PROMISSORY NOTE

The undersigned hereby extends the maturity of the Unsecured Promissory Note dated October 1, 2007 to May 31, 2008 at which time the Unsecured Promissory Note shall be due and payable in full in one installment.




/s/ Dennis L. Ryll	Dated:	12-18-07
Dennis L. Ryll, M.D.

324 S Hyde Park Avenue Suite 350 Tampa, Florida 33606