Item 1.

Security and Issuer.

This exit Schedule 13D/A — Amendment No. 3 (this “Amendment”) — amends and supplements the Schedule 13D/A filed on October 30, 2009 (as previously amended, the “Schedule 13D”) by the Reporting Person with respect to the Common Stock, par value $0.01 (“Shares”), of Alpha Pro Tech, Ltd., a Delaware corporation, with its principal executive offices located at Suite 112, 60 Centurian Drive, Markham, Ontario, Canada L3R 9R2 (the “Issuer”).

The total dispositions of Shares by the Reporting Person since the date of filing of the previous amendment to the Schedule 13D (Amendment No. 2 to the Schedule 13D, which was filed on October 30, 2009) represent less than 1% of the outstanding Shares of the Issuer and, therefore, do not rise to the defined materiality thresholds of Rule 13d-2(a) under the Securities Exchange Act of 1934, as amended.  However, as a result of such dispositions, the Reporting Person’s beneficial ownership has dropped below the 5% Schedule 13D reporting threshold.  Therefore, this Amendment constitutes the final amendment to the Reporting Person’s Schedule 13D and an exit filing for the Reporting Person and terminates the Reporting Person’s obligation to further amend the Schedule 13D.

Item 2.

Identity and Background.

(a)                    The Schedule 13D is being filed by William R. Lykken (the “Reporting Person”).

(b)                   The Reporting Person’s residence address is 310 West 17th Street, Grafton, North Dakota 58237-2005. 

(c)                    The Reporting Person is self-employed as president of Lykken, Inc., Box 606, Grafton, North Dakota 58237. 

(d)                   During the last five years, the Reporting Person has not been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors). 

(e)                    During the last five years, the Reporting Person has not been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws. 

(f)                      The Reporting Person is an individual resident of the State of North Dakota and a citizen of the United States of America.

Item 3.

Source and Amount of Funds or Other Consideration.

Not applicable.  This Amendment is being filed to report the disposition by the Reporting Person of Shares in an amount that has resulted in the Reporting Person no longer meeting the reporting requirements of Schedule 13D.

Item 4.

Purpose of Transaction.

The Reporting Person’s beneficial ownership has dropped below the 5% Schedule 13D reporting threshold.  Therefore, this Amendment constitutes the final amendment to the Reporting Person’s Schedule 13D and an exit filing for the Reporting Person and terminates the Reporting Person’s obligation to further amend the Schedule 13D.

Item 5.

Interest in Securities of the Issuer.

(a)                    Incorporated by reference to Items 11 and 13 of the Cover Page.

(b)                   Incorporated by reference to Items 7-10 of the Cover Page. 

(c)                    None. 

(d)                   With respect to the beneficial ownership reported for the Reporting Person, 50,775 Shares are held jointly with the Reporting Person’s spouse, and 42,170 Shares are held jointly with the Reporting Person’s sister.  These individuals share with the Reporting Person the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, those respective Shares. 

(e)                    Based on the 22,437,616 shares outstanding as of March 10, 2011, as reported by the Issuer in its Annual Report on Form 10-K for the fiscal year ended December 31, 2010, filed with the Securities and Exchange Commission on March 16, 2011, the Reporting Person has ceased to be the beneficial owner of more than 5% of the outstanding Shares of the Issuer.  The Reporting Person’s last disposition of Common Stock of the Issuer was on January 6, 2011.

Item 6.

Contracts, Arrangements, Understandings or Relationships with Respect to Securities of the Issuer.

Other than as described herein, there are no contracts, arrangements, understandings or relationships (legal or otherwise) between the Reporting Person and any other person with respect to the Shares.

Item 7.

Material to be Filed as Exhibits.

Not applicable.

/s/ William R. Lykken

William R. Lykken