US2833770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chj-chj
Assignee: —
•
Filing: —
•
Granted: 1958-05-06
•
Expires: 1975-05-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:50
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/12; C07D295/125; C07D295/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
A COMPOUND OF THE CLASS CONSISTING OF A FREE BASE AND ITS ACID SALTS, SAID FREE BASE HAVING THE FORMULA
Claim 2
Dependent Claim
20 words
A COMPOUND OF THE CLASS CONSISTING OF A FREE BASE AND ITS ACID SALTS, SAID FREE BASE HAVING THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |