8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 8-K

CURRENT REPORT PURSUANT

TO SECTION 13 OR 15(D) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported): August 2, 2005

3M COMPANY

(Exact Name of Registrant as Specified in Its Charter)

Delaware

(State or Other Jurisdiction of Incorporation)

File No. 1-3285	41-0417775
(Commission File Number)	(IRS Employer Identification No.)

3M Center, St. Paul, Minnesota	55144-1000
(Address of Principal Executive Offices)	(Zip Code)

(651) 733-1110

(Registrant’s Telephone Number, Including Area Code)

(Former Name or Former Address, if Changed Since Last Report)

        Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

o    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 8.01.  Other Events

On August 2, 2005, 3M Company issued a press release announcing the completion of its acquisition of CUNO Incorporated.  A copy of the press release is filed as Exhibit 99.1 to this report and incorporated herein by reference.

Item 9.01 Financial Statements and Exhibits

     (c) Exhibits

Exhibit Number	Description of Exhibit
99.1	Press Release, dated August 2, 2005, of 3M Company

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

3M COMPANY
By:	/s/ Gregg M. Larson
Gregg M. Larson,
Secretary

Dated: August 3, 2005

2

EXHIBIT INDEX

Exhibit Number	Description of Exhibit
99.1	Press Release, dated August 2, 2005, of 3M Company

3

EX-99.1

Exhibit 99.1

FOR IMMEDIATE RELEASE

3M Completes Acquisition of CUNO Incorporated

ST. PAUL, Minn. & MERIDEN, Conn.—Aug. 2, 2005—3M (NYSE:MMM) completed its acquisition of CUNO Incorporated (Nasdaq:CUNO) after CUNO’s shareholders voted in favor (i.e., 72.5 percent of CUNO’s outstanding shares) of the all cash transaction for $72 per share in a special shareholders meeting held earlier today.

CUNO, a subsidiary of 3M with its headquarters in Meriden, Conn., designs, manufactures, and markets a comprehensive line of filtration products for the separation, clarification, and purification of fluids and gasses. 3M and CUNO expect to take advantage of CUNO’s expertise in liquid filtration and 3M’s complementary capabilities in air filtration, along with its broad presence in markets where demand for filtration solutions is growing, to serve customers around the world more effectively.

About CUNO - A Market Leading Filtration Company

CUNO is a leader in the design, manufacture, and marketing of a comprehensive line of filtration products for the separation, clarification, and purification of fluids and gasses. Its proprietary products include uses in the healthcare, industrial, and drinking water markets. CUNO operates manufacturing facilities in the United States, Brazil, Mexico, France, Japan, Australia and China, and has sales offices throughout the world.

About 3M - A Global, Diversified Technology Company

Every day, 3M people find new ways to make amazing things happen. Wherever they are, whatever they do, the company’s customers know they can rely on 3M to help make their lives better. 3M’s brands include Scotch, Post-it, Scotchgard, Thinsulate, Scotch-Brite, Filtrete, Command and Vikuiti. Serving customers in more than 200 countries around the world, the company’s 67,000 people use their expertise, technologies and global strength to lead in major markets including consumer and office; display and graphics; electronics and telecommunications; safety, security and protection services; health care; industrial and transportation.

3M, Scotch, Post-it, Scotchgard, Thinsulate, Scotch-Brite, Filtrete, Command and Vikuiti are trademarks of 3M.

Contact:

Media Contact:

3M

Donna Fleming, 651-736-7646

or

CUNO Incorporated

Frederick C. Flynn, Jr., 203-238-8847

or

Investor Contacts:

3M

Mark Colin, 651-733-8206

or

Bruce Jermeland, 651-733-1807

or

CUNO Incorporated

Frederick C. Flynn, Jr., 203-238-8847