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:
Apr. 30, 1991
Filed:
Jun. 13, 1988
Applicant:
Inventors:
Kong Ma, Duluth, GA (US);
John T Pinder, Marietta, GA (US);
Assignee:
Rolls-Royce Inc., Greenwich, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F21V / ; B01F / ; B23K / ; B23K / ;
U.S. Cl.
CPC ...
252582 ; 252304 ; 21912162 ; 2191217 ;
Abstract
A barrier for use in laser drilling. The barrier is placed in front of those surfaces that one wishes to protect from the laser beam. The barrier comprises a thixotropic medium, for example polyacrylamide suspension in water. The medium includes material which will disperse the laser light and material which will emit light when exposed to the laser light. The light emitter materials could be luminescent materials, phosphorescent materials, or fluorescent materials.