Patent US3558502A successfully refreshed from Google Patents.
US3558502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemiluminescent process
Assignee: United States Department of the Army
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Filing: 1967-11-07
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Granted: 1971-01-26
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Expires: 1987-11-07
Abstract
Abstract IN A PROCESS OF PRODUCING LIGHT BY A TETRAKIS (DIMETHYLAMINO) ETHYLENE AND OXYGEN REACTION, THE IMPROVEMENT OF ADDING AN ALKALI METAL, METALLIC ALKYL OR METALLIC HYDRIDE THERETO TO INCREASE THE TOTAL LIGHT OUTPUT THEREOF.
Inventors
- 👤 Alfred F Tatyrek
- 👤 Burton Werbel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:16
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/06; C09K11/07
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |