Patent US3026321A successfully refreshed from Google Patents.
US3026321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: —
•
Filing: —
•
Granted: 1962-03-20
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Expires: 1979-03-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:32
CPC Classifications
C; C07; C07D; C07D241/00; C07D241/02; C07D241/06; C07D241/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
3 words
THE COMPOUND 4-(B-(3,4-DIMETHOXYPHENYL)ETHYL)2,6-DIKETOPIPERAZINE.
Claim 2
Dependent Claim
3 words
THE COMPOUND 4-(B-(3,4-DIMETHOXYPHENYL)ETHYL)2,6-DIKETOPIPERAZINE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-19 | 1965-09-18 | 1966-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-19 | 1969-09-18 | 1970-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-19 | 1973-09-18 | 1974-03-20 | $7700.00 | Window Closed / Lapsed |