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:
Nov. 11, 2008
Filed:
Jan. 20, 2004
Terry C. Tomt, Enumclaw, WA (US);
Bruce R. Davis, Seattle, WA (US);
Steven R. Jones, Sumner, WA (US);
Richard G. Wire, Bonney Lake, WA (US);
Terry C. Tomt, Enumclaw, WA (US);
Bruce R. Davis, Seattle, WA (US);
Steven R. Jones, Sumner, WA (US);
Richard G. Wire, Bonney Lake, WA (US);
The Boeing Company, Chicago, IL (US);
Abstract
A method for testing for the presence of sol-gel on an aluminum test specimen includes: preparing an ammonium molybdate solution; preparing a hydrochloric acid solution; and mixing the solutions in 2:1 ratio in each of a number of receptacles. A test specimen of unknown coating, a first control specimen, and a second control specimen are placed in the mixed solution in three receptacles. The first control specimen has a sol-gel coating over an alodine coating; and the second control specimen has an alodine only coating. By timing events such as a change in color of the test and control specimens or the solution becoming opaque, the method determines that the test specimen of unknown coating has a like coating to that of a particular one of the control specimens if the timing of the event of the test specimen and the timing of the event of the particular control specimen are comparable.