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# c12) United States Patent 

# Thomson 

# (54) MULTI-PURPOSE, NON-CORROSIVE CLEANING COMPOSITIONS AND METHODS OF USE 

(71) Applicants: Vi tech International, Inc., Edgerton, WI (US); Win Chemicals Ltd, Burlington (CA) 

(72) Inventor: Rod Thomson, Burlington (CA) 

(73) Assignees: Vitech International, Inc., Edgerton, WI (US); Win Chemicals Ltd, Burlington, Ontario (CA) 

( *) Notice: Subject to any disclaimer, the term ofthis patent is extended or adjusted under 35 U.S.C. 154(b) by O days. 

(21) Appl. No.: 13/901,911 

(22) Filed: May 24, 2013 

## (65) Prior Publication Data 

US 2013/0260649 Al Oct. 3, 2013 

(62) Division of application No. 11/637,397, filed on Dec. 12, 2006, now Pat. No. 8,450,257. 

(60) Provisional application No. 60/749,448, filed on Dec. 12, 2005. 

(51) Int. Cl. 

<img src='content_image/945054.jpg'>

(52) U.S. Cl. CPC ............ CllD 3/3454 (2013.01); CllD 713272 (2013.01); CllD 3/0073 (2013.01); CllD 7134 (2013.01); CllD 31323 (2013.01); CllD 3/3409 (2013.01) USPC ........... 510/101; 510/109; 510/174; 510/496; 451/28 

( 58) Field of Classification Search USPC ..................... 510/101, 109,274,496; 451/28 See application file for complete search history. 

## (56) References Cited 

<img src='content_image/945053.jpg'>

## Related U.S. Application Data 

## U.S. PATENT DOCUMENTS 

<img src='content_image/945064.jpg'>

# (IO) Patent No.: US 8,859,476 B2 

# (45) Date of Patent: Oct. 14, 2014 

<img src='content_image/945055.jpg'>

## FOREIGN PATENT DOCUMENTS 

<img src='content_image/945056.jpg'>

* cited by examiner 

Primary Examiner - Nicole M Buie-Hatcher 

Assistant Examiner - M. Reza Asdjodi 

(74) Attorney, Agent, or Firm -Reinhart Boerner Van Deuren s.c. 

## (57) ABSTRACT 

Compositions comprising an alkanesulfonic acid and an organic nitrogenous base, and related methods of use. 

US0088594 76B2 

## 18 Claims, No Drawings 

