Patent US2998421A successfully refreshed from Google Patents.
US2998421A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Guanroevo compounds and method of
Assignee: —
•
Filing: —
•
Granted: 1961-08-29
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Expires: 1978-08-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:08
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/70; C07D239/72; C07D239/78; C07D239/84; C07D239/95
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
A COMPOUND OF THE GROUP CONSISTING OF 2-GUANIDINO3:4-DIHYDROQUINAZOLINE COMPOUNDS HAVING THE FORMULA,
Claim 2
Dependent Claim
12 words
A COMPOUND OF THE GROUP CONSISTING OF 2-GUANIDINO3:4-DIHYDROQUINAZOLINE COMPOUNDS HAVING THE FORMULA,
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) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |