Horology: time measuring systems or devices – Miscellaneous
Reexamination Certificate
2006-11-21
2006-11-21
Cuneo, Kamand (Department: 2841)
Horology: time measuring systems or devices
Miscellaneous
C116S200000
Reexamination Certificate
active
07139226
ABSTRACT:
A long term rapid color changing time indicator includes a front part and a back part. The front part includes a transparent layer, an opaque layer, a colorant layer, and a neutralizing layer. The colorant layer includes a matrix and a colorant having a non-migratory form that does not migrate in the matrix and having a migratory form that migrates in the matrix. The back part has a reactant. When the front part and the back part are placed in contact, the reactant migrates into the neutralizing layer and a portion of the reactant is depleted by a coreactant. The unreacted reactant migrates into the colorant layer and reacts with the non-migratory form of the colorant converting the non-migratory form to the migratory form such that the migratory form of the colorant migrates through the opaque layer to cause a visual color indication in the transparent layer.
REFERENCES:
patent: 4154107 (1979-05-01), Giezen et al.
patent: 4212153 (1980-07-01), Kydonieus et al.
patent: 4903254 (1990-02-01), Haas
patent: 5045283 (1991-09-01), Patel
patent: 5058088 (1991-10-01), Haas et al.
patent: 5085802 (1992-02-01), Jalinski
patent: 5182212 (1993-01-01), Jalinski
patent: 5215956 (1993-06-01), Kawashima
patent: 5446705 (1995-08-01), Haas et al.
patent: 5602804 (1997-02-01), Haas
patent: 5633835 (1997-05-01), Haas et al.
patent: 5633836 (1997-05-01), Langer et al.
patent: 5756356 (1998-05-01), Yanagi et al.
patent: 5822280 (1998-10-01), Haas
patent: 6214623 (2001-04-01), Simons et al.
patent: 6254969 (2001-07-01), Eberle
patent: 6295252 (2001-09-01), Holt et al.
patent: 6452873 (2002-09-01), Holt et al.
patent: 6514462 (2003-02-01), Simons
patent: 6544925 (2003-04-01), Prusik et al.
patent: 2003/0053377 (2003-03-01), Spevacek
patent: 2003/0151985 (2003-08-01), Braunberger
Pasco Santurri et al., “4,4”-Diaminoazobenzene in Organic Syntheses, Collective vol. 5, John Wiley and Sons, pp. 341-343, 1973.
Green et al., “The Ionamines: A New Class of Dyestuffs for Acetate Silk”, Journal of the Society of Dyers and Colourists, 39, 11-16, (1923).
Bucherer et al., “Ueber Aldehyde-Bisulfite und Hydrosulfite”, Chemische Berichte, 39, 2814-2823, (1906).
Neelakatan et al., “alpha-Aminoalkanesulfonic Acids”, Journal of Organic Chemistry, 24, 1943-1948, (1959).
Davis Leonard H.
Haas David J.
Holt Robert J.
Brady Worldwide Inc.
Cuneo Kamand
Goodwin Jeanne-Marguerite
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