US2879270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-oxo-3, 4-dihydro-1, 4, 2-benzothiazine-2-acetic acid hydrazides and their preparation
Assignee: STWB Inc
•
Filing: 1956-06-20
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Granted: 1959-03-24
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Expires: 1976-06-20
Abstract
No abstract record available.
Inventors
- 👤 Frederick K Kirchner
- 👤 Ernest J Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:49
CPC Classifications
C; C07; C07D; C07D279/00; C07D279/10; C07D279/14; C07D279/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
9 words
THE PROCESS FOR PREPARING A COMPOUND HAVING THE FORMULA
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) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |