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:
Jan. 23, 2007
Filed:
Jun. 14, 2001
Patrick R. Fleming, Lake Elmo, MN (US);
Robert J. Devoe, Oakdale, MN (US);
Catherine A. Leatherdale, St. Paul, MN (US);
Todd A. Ballen, St. Paul, MN (US);
Jeffrey M. Florczak, Austin, TX (US);
Patrick R. Fleming, Lake Elmo, MN (US);
Robert J. DeVoe, Oakdale, MN (US);
Catherine A. Leatherdale, St. Paul, MN (US);
Todd A. Ballen, St. Paul, MN (US);
Jeffrey M. Florczak, Austin, TX (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A method of increasing the efficiency of a multiphoton absorption process and apparatus. The method includes: providing a photoreactive composition; providing a source of sufficient light for simultaneous absorption of at least two photons; exposing the photoreactive composition to at least one transit of light from the light source; and directing at least a portion of the first transit of the light back into the photoreactive composition using at least one optical element, wherein a plurality of photons not absorbed in at least one transit are used to expose the photoreactive composition in a subsequent transit.