US3729426A
Expired / Lapsed
US
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Chemiluminescent fluorescer comprising phenylethynyl substituted organic compounds
Assignee: Wyeth Holdings LLC
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Filing: 1970-04-20
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Granted: 1973-04-24
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Expires: 1990-04-20
Abstract
Abstract THIS INVENTION RELATES TO A CHEMILUMINESCENT SYSTEM TO OBTAIN CHEMILUMINESCENT LIGHT BY REACTING AN OXALIC-TYPE COMPOUND OF THE GROUP CONSISTING OF (A) AN OZALIC-TYPE ANHYDRIDE, (B) AN OXALIC-TYPE AMIDE, (C) AN OXALIC-TYPE O-ACYLHYDROSYLAMINE, AND (D) AN OXALIC-TYPE ESTER WITH A HYDROPEROXIDE COMPOUND IN THE PRESENCE OF A SOLVENT AND A PHENYLETHYNYL-SUBSTITUTED AROMATIC COMPOUND AS A FLUORESCER.
Inventors
- 👤 A Zweig
- 👤 D Maulding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:45
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) | 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 |