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:
Oct. 14, 1986
Filed:
Sep. 20, 1985
Applicant:
Inventors:
Fred I Nobel, Sands Point, NY (US);
Barnet D Ostrow, Roslyn, NY (US);
David N Schram, Freeport, NY (US);
Assignee:
LeaRonal, Inc., Freeport, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25D / ; C25D / ; C25D / ; C25D / ;
U.S. Cl.
CPC ...
204 444 ; 204 53 ; 204 541 ;
Abstract
A process and bath for electroplating tin, lead and tin-lead alloys. Improved brightness, solderability and broader current density ranges are achieved by the use in the baths of a soluble alkylene oxide condensate to provide a cloud point of the bath above about 90.degree. F., a soluble bismuth compound, an aromatic aldehyde and acetaldehyde. Tin and lead are supplied to the bath as salts of alkyl or alkylol sulfonic acids with sufficient free alkyl or alkylol sulfonic acid to provide a bath pH of less than 3.