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. 17, 2023
Filed:
Mar. 23, 2020
Applicant:
Optmed, Inc., New York, NY (US);
Inventors:
Vijaya Bhasker Gondi, Burlington, MA (US);
John Gregory Reid, Groton, MA (US);
Assignee:
H.B. Fuller Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 253/30 (2006.01); C07C 67/317 (2006.01); C07C 67/343 (2006.01);
U.S. Cl.
CPC ...
C07C 253/30 (2013.01); C07C 67/317 (2013.01); C07C 67/343 (2013.01);
Abstract
Process for the production of methylidene malonates and cyanoacrylates employing in-situ formed iminium salts derived from acid halides and/or acid anhydrides and N,N,N',N′-tetra hydrocarbyl diaminoalkanes, the acid halides and/or acid anhydrides being present in a molar excess relative to the diaminoalkanes, as co-reactants with select malonic acid esters and cyanoacetates, respectively.