Patent US4399226A successfully refreshed from Google Patents.
US4399226A
Expired / Lapsed
US
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Tagging with microcapsules containing perfluoroalkyl pentafluorosulfide
Assignee: 3M Co
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Filing: 1981-08-31
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Granted: 1983-08-16
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Expires: 2001-08-31
Abstract
Abstract Vapor permeable microcapsules filled with volatile perfluoroalkyl pentafluorosulfide and used to tag articles for the detection thereof.
Inventors
- 👤 Richard D. Danielson
- 👤 Robert A. Prokop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:57
CPC Classifications
C; C06; C06B; C06B23/00; C06B23/008; Y; Y10; Y10S; Y10S149/00; Y10S149/123; Y10S252/00; Y10S252/965; Y10T; Y10T436/00; Y10T436/13; Y10T436/18; Y10T436/182; Y10T436/19; Y10T436/196666
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
56 words
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
Independent Claim
56 words
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 3
Dependent Claim
18 words
The method according to claim 1 wherein said detection of said vapors is carried out by electron-capture detection.
Claim 4
Dependent Claim
31 words
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 5
Dependent Claim
31 words
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 6
Dependent Claim
23 words
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.
Claim 7
Dependent Claim
23 words
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.
References Cited (Backward Citations)
US2211737A
Cited
US3255352A
Cited
US3460972A
Cited
US3516941A
Cited
US3765007A
Cited
US3773573A
Cited
US3843557A
Cited
US3877374A
Cited
US4138356A
Cited
GB1501682A
Cited
US3991680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-15 | 1987-02-14 | 1987-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-15 | 1991-02-14 | 1991-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-15 | 1995-02-14 | 1995-08-16 | $7700.00 | Window Closed / Lapsed |