US3629129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemiluminescent smokes
Assignee: Ethyl Corp
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Filing: 1967-06-29
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Granted: 1971-12-21
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Expires: 1987-06-29
Abstract
Abstract CHEMILUMINESCENT SMOKE, THAT IS, A SMOKE VISIBLE BOTH BY DAY AND NIGHT, IS PRODUCED WHEN A COMPOSITION CONSISTING ESSENTIALLY OF (A) AN ALUMINUM ALKYL, (B) AN ETHER OR AN AMINE COMPLEXING AGENT, AND (C) AN ALKYL OR AN ARYL NITRILE, IS CONTACTED WITH AIR AND WATER.
Inventors
- 👤 Urho Albert Lehikoinen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:54
CPC Classifications
F; F21; F21K; F21K2/00; F21K2/06; C; C06; C06D; C06D3/00; C09; C09K; C09K11/00; C09K11/06; C09K11/07
Claims Analysis
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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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |