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US4461235A Expired / Lapsed US ⏱️ 0.0 years remaining

Vapor phase activator pad for a self-contained fingerprinting kit

Assignee: DURA-PRINT Inc A CORP OF
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Filing: 1983-07-20
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Granted: 1984-07-24
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Expires: 2003-07-20
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Abstract

Abstract The present invention is a vapor phase activator pad for use in a self-contained fingerprinting kit which includes a portable vapor tank into which the vapor phase activator pad is placed in order to fume an object suspected of containing latent fingerprints, the vapor phase activator pad includes a gauze pad. The gauze pad is chemically treated with a composition which consists of specified chlorinated organic solvents so that when a quantity of alkyl-cyanoacrylate is placed onto the vapor phase activator pad, the vapor phase activator pad generates vapors of the chemical cyanoacrylate. The composition consists of a first component and a second component. The first component is a mixture of two selective chemicals, trichloroethane in the range of 1 to 96 percent and stabilized with methanol in the range of 1 to 10 percent. The second component is a mixture of four selective chemicals, nitroethane and nitromethane in the range of 1 to 5 percent and stabilized with toluene in the range of 1 to 4 percent. The second component also includes an activator which is diethylenetriamine in the range of 1 to 9 percent wherein the composition provides a controlled oxidative vaporization of the quantity of alkyl-cyanoacrylate.

Inventors

  • 👤 William P. Morton

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 16:41
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/117; A61B5/1171; A61B5/1172

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 94 words
A vapor phase activator pad for use in a self-contained fingerprinting kit which includes a portable vapor tank into which said vapor phase activator pad is placed in order to fume an object suspected of containing latent fingerprints, said vapor phase activator pad comprising: a. a gauze pad; b. a composition which consists of specified chlorinated organic solvents wherein said gauze pad is chemically treated with said composition so that when a quantity of alkyl-cyanoacrylate is placed onto said vapor phase activator pad, said vapor phase activator pad generates vapors of the chemical cyanoacrylate.
Claim 2
Dependent Claim 94 words
A vapor phase activator pad for use in a self-contained fingerprinting kit which includes a portable vapor tank into which said vapor phase activator pad is placed in order to fume an object suspected of containing latent fingerprints, said vapor phase activator pad comprising: a. a gauze pad; b. a composition which consists of specified chlorinated organic solvents wherein said gauze pad is chemically treated with said composition so that when a quantity of alkyl-cyanoacrylate is placed onto said vapor phase activator pad, said vapor phase activator pad generates vapors of the chemical cyanoacrylate.
Claim 3
Dependent Claim 114 words
A vapor phase activator pad according to claim 1 wherein said composition consists of: a. a first component which is a mixture of two selective chemicals, trichloroethane in the range of 1 to 96 percent and stabilized with methanol in the range of 1 to 10 percent; and b. a second component which is a mixture of four selective chemicals, nitroethane and nitromethane in the range of 1 to 5 percent and stabilized with toluene in the range of 1 to 4 percent, said second component also includes an activator which is diethylenetriamine in the range of 1 to 9 percent wherein said composition provides a controlled oxidative vaporization of said quantity of alkyl-cyanoacrylate.
Claim 4
Dependent Claim 112 words
A vapor phase activator pad according to claim 1 wherein said composition consists of: a. a first component which is a mixture of two selective chemicals, trichloroethane in the range of 1 to 96 percent and stabilized with methanol in the range of 1 to 10 percent; and b. a second component which is a mixture of three selective chemicals, nitroethane in the range of 1 to 5 percent and stabilized with toluene in the range of 1 to 4 percent, said second component also includes an activator which is diethylenetriamine in the range of 1 to 9 percent wherein said composition provides a controlled oxidative vaporization of said quantity of alkyl-cyanoacrylate.
Claim 5
Dependent Claim 111 words
A vapor phase activator pad according to claim 1 wherein said composition consists of: a. a first component which is a mixture of two selective chemicals, trichloroethne in the range of 1 to 96 percent and stabilized with methanol in the range of 1 to 10 percent; and b. a second component which is a mixture of three selective chemicals, nitromethane in the range of 1 to 5 percent and stabilized with toluene in the range of 1 to 4 percent, said component also includes an activator which is diethylenetriamine in the range of 1 to 9 percent wherein said composition provides a controlled oxidative vaporization of said quantity pf alkyl-cyanoacrylate.

References Cited (Backward Citations)

US4258644A Cited
US4258073A Cited
US4260645A Cited
US4297383A Cited
US4381159A Cited
US4379178A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1987-07-24 1988-01-23 1988-07-24 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1991-07-24 1992-01-23 1992-07-24 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1995-07-24 1996-01-23 1996-07-24 $7700.00 Window Closed / Lapsed

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