US3399328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemiluminescence of 2, 3, 6, 7-tetraphenylisobenzofuran and related materials
Assignee: Wyeth Holdings LLC
•
Filing: 1965-11-22
•
Granted: 1968-08-27
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Expires: 1985-11-22
Abstract
No abstract record available.
Inventors
- 👤 Zweig Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:17
CPC Classifications
F; F21; F21K; F21K2/00; F21K2/06; F21K2/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3213440A
Cited
US3319132A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |