US2833761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfapyridazines and methods of preparing the same
Assignee: Wyeth Holdings LLC
•
Filing: 1957-01-28
•
Granted: 1958-05-06
•
Expires: 1977-01-28
Abstract
No abstract record available.
Inventors
- 👤 Dorothy M Murphy
- 👤 Robert G Shepherd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:40
CPC Classifications
C; C07; C07D; C07D237/00; C07D237/02; C07D237/06; C07D237/10; C07D237/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A COMPOUND HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
6 words
A COMPOUND HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
US2371115A
Cited
US2721200A
Cited
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 |