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:
Sep. 07, 2010
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 for enhancing photoreactive absorption in a specified volume element of a photoreactive composition. In one embodiment, the method includes: providing a photoreactive composition: providing a source of light (preferably, a pulsed laser) sufficient for simultaneous absorption of at least two photons by the photoreactive composition, the light source having a beam capable of being divided: dividing the light beam into a plurality of equal path length exposure beams: and focusing the exposure beams in a substantially non-counter propagating manner at a single volume element of the photoreactive composition simultaneously to react at least a portion of the photoreactive composition. In another embodiment, a method includes: providing a photoreactive composition capable of photoreactive absorption: and exposing the photoreactive composition to laser light from a plurality of substantially non-counter propagating directions simultaneously, wherein the light overlaps in time and space at a predetermined focus spot.