Patent US3557233A successfully refreshed from Google Patents.
US3557233A
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US
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Aromatic hydrocarbons substituted by phenylethynyl groups
Assignee: Wyeth Holdings LLC
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Filing: 1968-03-14
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Granted: 1971-01-19
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Expires: 1988-03-14
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 OXALIC-TYPE ANHYDRIDE, (B) AN AXALIC-TYPE AMIDE, (C) AN OXALIC-TYPE O-ACYLHYDROCYAMINE, 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
- 👤 Arnold Zweig
- 👤 Donald Roy Maulding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:59
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/06; C09K11/07; C07; C07C; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/22; C07C2603/24
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |