Patent US2847153A successfully refreshed from Google Patents.
Patent US2830987A successfully refreshed from Google Patents.
US2830987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of phenthiazine
Assignee: —
•
Filing: —
•
Granted: 1958-04-15
•
Expires: 1975-04-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:47
CPC Classifications
C; C07; C07D; C07D279/00; C07D279/10; C07D279/14; C07D279/18; C07D401/00; C07D401/02; C07D401/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A COMPOUND SELECTED FROM THE CLASS CONSISTING OF COMPOUNDS OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
13 words
A COMPOUND SELECTED FROM THE CLASS CONSISTING OF COMPOUNDS OF THE GENERAL 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) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |