US3732413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light producing device
Assignee: United States Department of the Navy
•
Filing: 1965-09-30
•
Granted: 1973-05-08
•
Expires: 1985-09-30
Abstract
Abstract A hermetically sealed aluminum container provided with a pulltab means for admitting air and a cotton wick soaked with tetrakis (dimethylamino)ethylene which when exposed to air produces a blue-green light. The device is a reliable map-reader or a non-beaming flashlight.
Inventors
- 👤 S Shefler
- 👤 S Little
- 👤 J Mills
- 👤 L Humiston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:36
CPC Classifications
F; F21; F21K; F21K2/00; F21K2/06; C; C09; C09K; C09K11/00; C09K11/06; C09K11/07
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
72 words
A non-beaming flashlight which does not attract unwanted attention consisting of a hermetically sealed wafer-like container, and a wick sealed within said container; said wick consisting of a porous cloth substrate impregnated with tetrakis(dimethylamino)ethylene; and said container composed of a light-weight metal compatible with said tetrakis(dimethylamino)ethylene and having on one side an easy-opening pull tab means for admitting air into said container whereby said tetrakis(dimethylamino)ethylene is activated producing a nonbeaming blue-green light.
References Cited (Backward Citations)
US2574842A
Cited
US2750027A
Cited
US3239406A
Cited
US3283941A
Cited
US3303962A
Cited
US3350553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |