Patent US4550041A successfully refreshed from Google Patents.
US4550041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Article containing a thixotropic additive and cyanoacrylate monomer employed for developing latent fingerprints
Assignee: Henkel Loctite Corp
•
Filing: 1984-12-14
•
Granted: 1985-10-29
•
Expires: 2004-12-14
Abstract
Abstract Latent fingerprints are developed by exposing them to vapors generated from a thin film of a storage stable cyanoacrylate monomer and a thixotropic additive in sufficient amount to render the composition substantially non-flowable. The monomer film should have a surface area of at least 129 sq. cm. An envelope package for the monomer composition has inner polyethylene surfaces. The envelope may be peeled open to expose the inner surfaces coated with a film of the composition.
Inventors
- 👤 Richard T. Thompson
- 👤 Philip Hinkle
- 👤 Robert B. Carroll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:25
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/117; A61B5/1171; A61B5/1172; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31533; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
101 words
An article for rapid room temperature generation of cyanoacrylate monomer vapors comprising an envelope containing a storage stable composition of a cyanoacrylate monomer and a thixotropic additive in an amount effective to render the composition substantially non-flowable on a vertical surface, the envelope defined by a pair of opposed sheets of a material having an inner plastic film surface, said sheets being sealed together along the edges thereof in a manner adapted to permit separation of the sheets by tearing or peeling along the edges thereof so as to expose the inner sheet surfaces coated with a film of said composition.
Claim 2
Dependent Claim
101 words
An article for rapid room temperature generation of cyanoacrylate monomer vapors comprising an envelope containing a storage stable composition of a cyanoacrylate monomer and a thixotropic additive in an amount effective to render the composition substantially non-flowable on a vertical surface, the envelope defined by a pair of opposed sheets of a material having an inner plastic film surface, said sheets being sealed together along the edges thereof in a manner adapted to permit separation of the sheets by tearing or peeling along the edges thereof so as to expose the inner sheet surfaces coated with a film of said composition.
Claim 3
Dependent Claim
83 words
An article as in claim 1 wherein said two envelope defining sheets are rectangular sheets heat sealed together along three edges thereof and having a third sheet interposed between said first two sheets along the fourth edges thereof, said third sheet having a plastic film inner surface, and the third sheet being interposed between the first two sheets in folded form such that its inner plastic film surface contacts and is heat sealed to the respective fourth edges of the first two sheets.
Claim 4
Dependent Claim
15 words
An article as in claim 2 wherein the sheet material is a laminate of paper/polyethylene/aluminum/polyethylene.
Claim 5
Dependent Claim
24 words
An article as in claim 1 wherein the inner composition coated inner sheet surfaces have a combined area of at least 20 sq. in.
Claim 6
Dependent Claim
18 words
An article as in claim 4 wherein the said combined surface area is at least 40 sq. in.
Claim 7
Dependent Claim
39 words
An article as in claim 1 wherein one of said opposed sheets includes a portion on the outer surface thereof having a layer of a pressure sensitive adhesive thereon whereby the article may be affixed to a vertical surface.
Claim 8
Dependent Claim
14 words
An article as in claim 1 wherein said inner plastic film surface is polyethylene.
Claim 9
Dependent Claim
22 words
An article as in claim 2 wherein said inner surfaces of said first two sheet and said third sheet are all polyethylene.
References Cited (Backward Citations)
US3380646A
Cited
US3502521A
Cited
US3523628A
Cited
US3839065A
Cited
US3524537A
Cited
US3663501A
Cited
US3940362A
Cited
US3935993A
Cited
US4102945A
Cited
US4180913A
Cited
JPS5664933A
Cited
US4297383A
Cited
US4379178A
Cited
US4363286A
Cited
US4407842A
Cited
US4461235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-28 | 1989-04-29 | 1989-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-28 | 1993-04-29 | 1993-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-28 | 1997-04-29 | 1997-10-29 | $7700.00 | Window Closed / Lapsed |