Patent US3568411A successfully refreshed from Google Patents.
US3568411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemosensor bomb detection device
Assignee: Federal Aviation Administration
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Filing: 1969-03-18
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Granted: 1971-03-09
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Expires: 1989-03-18
Abstract
Abstract THIS INVENTION RELATES TO AN IMPROVED BOMB DETECTOR FOR IDENTIFYING THE PRESENCE OF DYNAMITE, FOR EXAMPLE, IN AN AIRPLANE. THE BASIC METHOD DETECTS THE PRESENCE OF ETHYLENE GLYCOL DINITRATE VAPOR IN AIR. THE ESSENTIAL STEPS ARE SELECTIVE ADSORPTION OF THE VAPOR ON A SURFACE DESORPTION OF THE VAPOR AND A TIMED PASAGE THROUGH A SHORT, CHROMATOGRAPHIC PARTITION COLUMN, FOLLOWED BY PASSAGE THROUGH A VAPOR DETECTOR WHICH EMITS AN IDENTIFYING SIGNAL. THE IMPROVEMENT COMPRISES THE USE OF GOLDPLATED, COPPER FOAMETAL AS A PRIMARY ADSORBER SURFACE FOR ETHYLENE GLYCOL DINITRATE VAPOR.
Inventors
- 👤 Andrew Dravnieks
- 👤 Jay Fischman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:27
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |