Patent US3180867A successfully refreshed from Google Patents.
US3180867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piperazine derivatives
Assignee: US Vitamin and Pharmaceutical Corp
•
Filing: 1961-05-17
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Granted: 1965-04-27
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Expires: 1981-05-17
Abstract
No abstract record available.
Inventors
- 👤 Seymour L Shapiro
- 👤 Freedman Louis
- 👤 Soloway Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:27
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/12; C07D295/125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
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US3007928A
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US2647121A
Cited
CH346221A
Cited
US2834782A
Cited
US2939816A
Cited
AT205503B
Cited
US2927924A
Cited
US2980683A
Cited
US2979508A
Cited
US2997474A
Cited
US2990327A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-26 | 1968-10-26 | 1969-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-26 | 1972-10-26 | 1973-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-26 | 1976-10-26 | 1977-04-27 | $7700.00 | Window Closed / Lapsed |