Patent US6085222A successfully refreshed from Google Patents.
Patent US3341529A successfully refreshed from Google Patents.
US3341529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing 2-styrylnaphthoxazole compounds
Assignee: Wyeth Holdings LLC
•
Filing: 1964-09-10
•
Granted: 1967-09-12
•
Expires: 1984-09-10
Abstract
No abstract record available.
Inventors
- 👤 Buell Bennett George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:31
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/52; C07D263/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A METHOD FOR PREPARING A 2-STYRHLNAPHTHOXAZOLE COMPOUND WHICH COMPRISES REACTING THE ANIL FORMED FROM CINNAMALDEHYDE AND AN ORTHO AMINONAPHTHOL COMPOUND SELECTED FROM THE GROUP CONSISTING OF 1-AMINO-2-NAPHTHOL, 3-AMINO-2-NAPHTHOL, 2-AMINO-1-NAPHTHOL, 1-AMINO-2-NAPHTHOL-3-CARBANILIDE, 1-AMINO-2-NAPHTHOL-4-SULFONIC ACIDS, AND 1-AMINO-2-NAPHTHOL-3-CARBOXYLIC ACID WITH NITROUS ACID IN A WATER-MISCIBLE SOLVENT, INTRODUCING WATER TO THE REACTION MIXTURE TO PRECIPITATE THE 2-STYRYLNAPHTHOXAZOLE PRODUCT AND ISOLATING SAID PRODUCT.
Claim 2
Independent Claim
57 words
A METHOD FOR PREPARING A 2-STYRHLNAPHTHOXAZOLE COMPOUND WHICH COMPRISES REACTING THE ANIL FORMED FROM CINNAMALDEHYDE AND AN ORTHO AMINONAPHTHOL COMPOUND SELECTED FROM THE GROUP CONSISTING OF 1-AMINO-2-NAPHTHOL, 3-AMINO-2-NAPHTHOL, 2-AMINO-1-NAPHTHOL, 1-AMINO-2-NAPHTHOL-3-CARBANILIDE, 1-AMINO-2-NAPHTHOL-4-SULFONIC ACIDS, AND 1-AMINO-2-NAPHTHOL-3-CARBOXYLIC ACID WITH NITROUS ACID IN A WATER-MISCIBLE SOLVENT, INTRODUCING WATER TO THE REACTION MIXTURE TO PRECIPITATE THE 2-STYRYLNAPHTHOXAZOLE PRODUCT AND ISOLATING SAID PRODUCT.
References Cited (Backward Citations)
GB669402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |