Process for preparing (3-oxo-2,3-dihydro-1H-isoindol-1-yl) acetylguanidine derivatives

US7531569B2 · kind B2 · utility

Assignee

• Sanofi-Aventis Deutschland GMBH · DE

Inventors

• Gerrit Schubert · Kelkheim, DE
• Joerg Rieke-Zapp · Frankfurt, DE
• Johannes Keil · Frankfurt, DE
• Heinz-Werner Kleemann · Bischofsheim, DE
• Reda Hanna · Allentown, US
• Bao-Guo Huang · Cheektowaga, US
• Xiao-Dong Wu · Bound Brook, US
• Yves Gouraud · Montfermeil, FR

Key dates

• Filing date: Dec 1, 2004
• Grant date: May 12, 2009
• Expiry date: Dec 1, 2024

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61P29/00
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

A method and apparatus for preventing board warpage during the application and curing or drying of liquid epoxies, or the like, on printed circuit boards using a clamping fixture assembly, which includes at least one clamping fixture support and at least one clamping fixture overlay. If desired, a plurality of printed circuit boards may be processed using an appropriate clamping fixture assembly. Furthermore, the clamping fixture may be constructed so a slight bow or curvature thereof can counter either a convex or concave bow or curvature of the printed circuit board.In the method, at least one printed circuit board is mounted to a clamping fixture support whereby a clamping fixture overlay is placed on top of the first printed circuit board.