US2780633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making benzoxazole
Assignee: —
•
Filing: —
•
Granted: 1957-02-05
•
Expires: 1974-02-05
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:50
CPC Classifications
C; C07; C07D; C07D413/00; C07D413/02; C07D413/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
THE METHOD FOR THE PREPARATION OF 2-AMINO-5CHLORO-BENZOXAZOLE, WHICH COMPRISES HEATING 2-HYDROXY5-CHLOROPHENYLTHIOUREA TO REMOVE HYDROGEN SULFIDE THEREFROM.
Claim 2
Independent Claim
16 words
THE METHOD FOR THE PREPARATION OF 2-AMINO-5CHLORO-BENZOXAZOLE, WHICH COMPRISES HEATING 2-HYDROXY5-CHLOROPHENYLTHIOUREA TO REMOVE HYDROGEN SULFIDE THEREFROM.
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) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |