Patent US2999880A successfully refreshed from Google Patents.
US2999880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-substituted-n'-benzoylhydrazines
Assignee: Bristol Myers Co
•
Filing: 1958-06-20
•
Granted: 1961-09-12
•
Expires: 1978-06-20
Abstract
No abstract record available.
Inventors
- 👤 William B Wheatley
- 👤 Harry L Dickison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:47
CPC Classifications
C; C07; C07C; C07C243/00; C07C243/24; C07C243/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A FREE BASE AND THE NONTOXIC ACID ADDITION SALTS THEREOF, SAID FREE BASE HAVING THE FORMULA
Claim 2
Dependent Claim
24 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A FREE BASE AND THE NONTOXIC ACID ADDITION SALTS THEREOF, 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) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |