Signals and indicators – Indicators – Chemically activated type
Reexamination Certificate
2005-12-13
2005-12-13
Bennett, G. Bradley (Department: 2859)
Signals and indicators
Indicators
Chemically activated type
C116S200000, C368S327000, C422S067000, C436S164000
Reexamination Certificate
active
06973894
ABSTRACT:
A timing device for visually determining the passage of a preselected period of time including a tube (2) having opposed ends with at least one of the opposed ends having a reservoir (10a, 10b) for storing a reactant or an indicator, a transport system (12) extending from the reservoir to the other of the opposed ends of the tube (2) for transporting at least one of the reactant or the indicator until they contact each other, a reactant, and an indicator which when in contact with the reactant via the transport means (12) emits an observable change in property wherein the minimum length of the period of time corresponds to the time it takes for the reactant and indicator to contact each other. Thc tube (2) has a shape which undergoes at least two material changes of direction exceeding 90° and up to 180° from one of the opposed ends to the other.
REFERENCES:
patent: 244105 (1881-07-01), Bahmann
patent: 2560537 (1951-07-01), Anderson
patent: 2671628 (1954-03-01), Clark
patent: 3242733 (1966-03-01), Johnson
patent: 3414415 (1968-12-01), Broad, Jr.
patent: 3479877 (1969-11-01), Allen et al.
patent: 3751382 (1973-08-01), Ljungberg et al.
patent: 3768976 (1973-10-01), Hu et al.
patent: 3942467 (1976-03-01), Witonsky
patent: 3951098 (1976-04-01), Meyers
patent: 3954011 (1976-05-01), Manske
patent: 3996007 (1976-12-01), Fang et al.
patent: 4028876 (1977-06-01), Delatorre
patent: 4408557 (1983-10-01), Bradley et al.
patent: 5114679 (1992-05-01), Reifler et al.
patent: 5602804 (1997-02-01), Haas
patent: 6269764 (2001-08-01), Adamy et al.
patent: 2004/0013048 (2004-01-01), Adamy
Adamy Steven T.
Cala Francis R.
Bennett G. Bradley
Church & Dwight & Co., Inc.
Courson Tania C.
Kipnes Allen R.
Shear Stephen B.
LandOfFree
Timing device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Timing device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Timing device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3487641