US3763206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-hydroxy-2,6-di-tert.alkylphenyl-cyanates
Assignee: Novartis Corp
•
Filing: 1971-10-26
•
Granted: 1973-10-02
•
Expires: 1991-10-26
Abstract
Abstract NEW 4-HYDROXY - 2,6 - DI - TERT.ALKYLPHENYLCYANATES ARE INTERMEDIATES FOR THE SYNTHESIS OF STABILIZERS. THEY ARE PREPARED BY REACTING A 2,6-DI-TERT.ALKYLHYDROQUINON WITH BROMO- OR CHLOROCYANINE.
Inventors
- 👤 H Brunetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:18
CPC Classifications
C; C07; C07C; C07C261/00; C07C261/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |