US2824111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrrolidines
Assignee: Pharmacia and Upjohn Co
•
Filing: 1952-11-12
•
Granted: 1958-02-18
•
Expires: 1972-11-12
Abstract
No abstract record available.
Inventors
- 👤 Richard V Heinzelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:35
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08; C07D295/096; C07D207/00; C07D207/02; C07D207/04; C07D207/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF (A) PYRROLIDINES OF THE FORMULA:
Claim 2
Dependent Claim
13 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF (A) PYRROLIDINES OF THE FORMULA:
References Cited (Backward Citations)
DE80521C
Cited
FR884569A
Cited
GB624118A
Cited
GB627139A
Cited
US2552502A
Cited
GB682160A
Cited
US2662886A
Cited
US2686808A
Cited
US2683742A
Cited
US2682543A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |