# US 4,399,226 A · Tagging with microcapsules containing perfluoroalkyl pentafluorosulfide

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- Number: US 4,399,226 A
- Document ID: US4399226A
- Status: Granted
- Kind: A
- Application number: 06/298,339
- Filed: 1981-08-31
- Granted: 1983-08-16
- Earliest claimed: 1978-09-28
- Assignees: Minnesota Mining and Manufacturing Company
- Inventors: Richard D. Danielson; Robert A. Prokop
- Web page: https://patentgrep.com/patent/US4399226A

## CPC

- C06B 23/008: {Tagging additives}
- Y10S 149/123: Tagged compositions for identifying purposes
- Y10S 252/965: Retrospective product identification, e.g. tags and tracers
- Y10T 436/13: Tracers or tags
- Y10T 436/182: Organic or sulfhydryl containing [e.g., mercaptan, hydrogen, sulfide, etc.]
- Y10T 436/196666: Carbon containing compound [e.g., vinylchloride, etc.]
- C06B: EXPLOSIVES OR THERMIC COMPOSITIONS (blasting F42D); MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES (compounds in general C01, C07 or C08; {demolition agents based on cementitious or like materials C04B41/0009})
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Vapor permeable microcapsules filled with volatile perfluoroalkyl pentafluorosulfide and used to tag articles for the detection thereof.

## Claims

### Claim 1

The method of detecting an article which comprises associating therewith, as a tag, vapor permeable microcapsules containing volatile perfluoroalkyl pentafluorosulfide, vapors of which diffuse through the walls of the microcapsules and are emitted into the atmosphere surrounding said article, and detecting the presence of said vapors in said atmosphere and thus the presence of said article.

### Claim 2 (depends on 1)

The method according to claim 1 wherein said detection of said vapors is carried out by electron-capture detection.

### Claim 3

An article having associated therewith, as a tag, vapor permeable microcapsules containing volatile perfluoroalkyl pentafluorosulfide, vapors of which diffuse through the walls of said microcapsules into the atmosphere surrounding said article.

### Claim 4

Explosives or explosive devices containing or having associated therewith, as a tag, vapor permeable micro-capsules containing volatile perfluoroalkyl pentafluoro-sulfide as a detection taggant.