US2938908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aryl-hydrazino-pyridines
Assignee: Wyeth Holdings LLC
•
Filing: 1958-03-07
•
Granted: 1960-05-31
•
Expires: 1978-03-07
Abstract
No abstract record available.
Inventors
- 👤 Tsang Sien Moo
- 👤 Charles E Lewis
- 👤 Albert P Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:16
CPC Classifications
C; C09; C09B; C09B26/00; C09B26/02; C09B26/04; C09B27/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
4 words
HYDRAZINES OF THE FORMULA
Claim 2
Dependent Claim
4 words
HYDRAZINES OF THE FORMULA
Claim 3
Dependent Claim
1 words
N1-4ACETAMINOPHENYL-N2-2-PYRIDYLHYDRAZINE.
Claim 4
Dependent Claim
1 words
N1-4ACETAMINOPHENYL-N2-2-PYRIDYLHYDRAZINE.
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) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |