The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 20, 2013
Filed:
Jun. 07, 2007
Robin E. Wright, Inver Grove Heights, MN (US);
Mahfuza B. Ali, Mendota Heights, MN (US);
Jessica M. Buchholz, Saint Paul, MN (US);
Louis C. Haddad, Mendota Heights, MN (US);
Linda K. M. Olson, Saint Paul, MN (US);
Matthew T. Scholz, Woodbury, MN (US);
Narina Y. Stepanova, Inver Grove Heights, MN (US);
Michael J. Svarovsky, Eagan, MN (US);
Richard L. Walter, Saint Paul, MN (US);
Caroline M. Ylitalo, Stillwater, MN (US);
Diane R. Wolk, Woodbury, MN (US);
Yifan Zhang, Woodbury, MN (US);
Robin E. Wright, Inver Grove Heights, MN (US);
Mahfuza B. Ali, Mendota Heights, MN (US);
Jessica M. Buchholz, Saint Paul, MN (US);
Louis C. Haddad, Mendota Heights, MN (US);
Linda K. M. Olson, Saint Paul, MN (US);
Matthew T. Scholz, Woodbury, MN (US);
Narina Y. Stepanova, Inver Grove Heights, MN (US);
Michael J. Svarovsky, Eagan, MN (US);
Richard L. Walter, Saint Paul, MN (US);
Caroline M. Ylitalo, Stillwater, MN (US);
Diane R. Wolk, Woodbury, MN (US);
Yifan Zhang, Woodbury, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
Polymeric beads and methods of making the polymeric beads are described. The polymeric beads are crosslinked hydrogels or dried hydrogels. The polymeric beads are formed from droplets of a precursor composition that are exposed to radiation. The droplets are totally surrounded by a gas phase. The precursor composition contains a polar solvent and a polymerizable material miscible in the polar solvent. The polymerizable material has an average number of ethylenically unsaturated groups per monomer molecule equal to at least 1.2.