US2837522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted alkylenedipiperazines
Assignee: Wyeth Holdings LLC
•
Filing: 1955-10-20
•
Granted: 1958-06-03
•
Expires: 1975-10-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Frederick L Bach
- 👤 Herbert J Brabander
- 👤 Kushner Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:34
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/16; C07D295/20; C07D295/205
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
COMPOUNDS SELECTED FROM THE GROUP HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
9 words
COMPOUNDS SELECTED FROM THE GROUP HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
US2756231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |