US2847461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensation products of p-aminosalicylic acid
Assignee: Wyeth Holdings LLC
•
Filing: 1953-06-16
•
Granted: 1958-08-12
•
Expires: 1973-06-16
Abstract
No abstract record available.
Inventors
- 👤 Hans Z Lecher
- 👤 Bennett G Buell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:48
CPC Classifications
C; C09; C09B; C09B69/00; C09B69/10; C09B69/106; C07; C07K; C07K1/00; C07K1/006; C09B33/00; C09B33/02; C09B39/00; C09B67/00; C09B67/0071; C09B67/0079
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
COMPOUNDS OF THE STRUCTURE
Claim 2
Dependent Claim
4 words
COMPOUNDS OF THE STRUCTURE
References Cited (Backward Citations)
GB191505444A
Cited
DE522788C
Cited
US2395229A
Cited
US2410397A
Cited
US2447222A
Cited
US2445242A
Cited
US2440658A
Cited
US2608550A
Cited
US2517924A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |