EP0449291A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process for the creation of selective fluorescent sites or regions in parylene films and coatings
Assignee: Union Carbide Chemicals and Plastics Technology LLC
•
Filing: 1991-03-28
•
Granted: —
•
Expires: 2011-03-28
Abstract
Abstract A method is provided for imparting to articles comprised in whole or in part of parylene, selective sites which fluoresce upon exposure to light of a proper wavelength. Articles treated by the process of the invention are also provided.
Inventors
- 👤 William Frederick Beach
- 👤 Terry Marshall Austin
- 👤 Bruce John Humphrey
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 18:27
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/08; B01J19/12; B01J19/122; B01J19/123; B29; B29C; B29C71/00; B29C71/04; G; G09; G09F; G09F3/00; B29C35/00; B29C35/02; B29C35/08; B29C35/0805; B29C2035/0827; B29K; B29K2065/00; B29K2995/00; B29K2995/0018
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
77 words
A process for creating selective sites of fluorescence in articles comprised in whole or in part of parylene, which process comprises the steps of: 1) shielding with shielding means, those portions of parylene in which fluorescent sites are not desired, 2) exposing the remainder of the parylene to light excitation means capable of creating fluorescent sites in the parylene and for a period of time sufficient to create such sites, and 3) thereafter removing the shielding means.
Claim 2
Dependent Claim
11 words
The process of claim 1 wherein said parylene is Parylene C.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein said parylene is Parylene D.
Claim 4
Dependent Claim
19 words
The process of claim 1 wherein said excitation means has a wavelength of from about 250 to 400. nm.
Claim 5
Dependent Claim
19 words
The process of claim 1 wherein said excitation means has a wavelength of from about 270 to 300 nm.
Claim 6
Dependent Claim
13 words
The process of claim 1 wherein the excitation means is a mercury lamp.
Claim 7
Dependent Claim
24 words
The process of claim 1 wherein the parylene is exposed to said excitation means for a period of about 1 second to 1 hour.
Claim 8
Dependent Claim
25 words
The process of claim 1 wherein the parylene is exposed to said excitation means for a period of about 5 seconds to about 5 minutes.
Claim 9
Dependent Claim
25 words
An article comprised of in whole or in part of parylene and wherein selective sites have been rendered fluorescent by the process of claim 1.
Claim 10
Dependent Claim
21 words
The article of claim 9 which is in the form of a film comprised in whole or in part of parylene.
Claim 11
Dependent Claim
21 words
The article of claim 9 wherein the parylene is present as a coating on at least a portion of said article.
Claim 12
Dependent Claim
26 words
The article of claim 9 which is in the form of a tape and wherein at least one surface of said tape is coated with parylene.
Claim 13
Dependent Claim
26 words
The article of claim 9 which is in the form of a disk and wherein at least one surface of said disk is coated with parylene.
Claim 14
Dependent Claim
10 words
The article of claim 9 which is a negotiable instrument.
Claim 15
Dependent Claim
8 words
The article of claim 9 which is currency.
Claim 16
Dependent Claim
12 words
The article of claim 9 which is a stock or bond certificate.
Claim 17
Dependent Claim
10 words
The article of claim 9 which is a computer tape.
Claim 18
Dependent Claim
10 words
The article of claim 9 which is a computer disk.
Claim 19
Independent Claim
111 words
A method of identifying and insuring the authenticity of an article which comprises the steps of: 1) coating at least a portion of said article with parylene; 2) shielding with shielding means of a particular configuration, those portions of the parylene coating in which fluorescent sites are not desirable; 3) exposing the remainder of the parylene to light excitation means capable of creating fluorescent sites in the parylene and for a period of time sufficient to create such sites, 4) removing the shielding means; and 5) exposing the article to light of a wavelength suitable for the detection of the fluorescent sites and to confirm the presence of the predetermined configuration.
Claim 20
Independent Claim
82 words
A method of storing and retrieving data from an information retrieval source which comprises: 1) providing a tape or disk article of the type used to store computer software and data; 2) coating at least a portion of said article with parylene 3) inducing selected fluorescent sites into said parylene with a light excitation source and wherein said fluorescent sites correspond to individual units of readable data; 4) reading said stored data by sequentially exposing said sites to a light detecting source.
Claim 21
Dependent Claim
11 words
The method of claim 20 wherein said article is a tape.
Claim 22
Dependent Claim
11 words
The method of claim 20 wherein said article is a disk.
Claim 23
Dependent Claim
14 words
An article containing stored and retrievable data prepared by the method of claim 20.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.