Patent US3729425A successfully refreshed from Google Patents.
US3729425A
Expired / Lapsed
US
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Porous chemiluminescent material and method of manufacture
Assignee: United States Department of the Navy
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Filing: 1969-04-29
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Granted: 1973-04-24
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Expires: 1989-04-29
Abstract
Abstract A POROUS SPONGE-LIKE CHAMILUMINESCENT MATERIAL COMPRISING POROUS POLYETHYLENE IMPREGNATED WITH TETRAKIS(DIMETHYLAMINO) ETHYLENE AND HAVING LITHIUM CHLORIDE DISPERSED THROUGHOUT THE WALLS OF THE PORES. THIS MATERIAL IS USED IN LOCATION MARKERS, FREE-FALL DISPENSERS, AND THE LIKE, AND GIVES GOOD LIGHT YIELD UNDER HUMID CONDITIONS.
Inventors
- 👤 C Heller
- 👤 H Richter
- 👤 Ewan W Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:24
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/06; C09K11/07; C08; C08J; C08J9/00; C08J9/36; C08J9/40
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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |