Patent JPS596650A successfully refreshed from Google Patents.
US2921070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Basic esters of 3-methylflavone-8-carboxylic acid
Assignee: Recordati Laboratorio Farmacologico SpA
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Filing: 1958-10-21
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Granted: 1960-01-12
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Expires: 1978-10-21
Abstract
No abstract record available.
Inventors
- 👤 Re Paolo Da
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:34
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/22; C07D311/26; C07D311/28; C07D311/30; C07C; C07C65/00; C07C65/32; C07C65/40
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
23 words
A CHEMICAL COMPOUND OF THE CLASS CONSISTING OF A FREE BASE AND ITS NONTOXIC ACID ADDDITION SALTS, SAID FREE BASE HAVING THE FORMULA:
Claim 2
Dependent Claim
23 words
A CHEMICAL COMPOUND OF THE CLASS CONSISTING OF A FREE BASE AND ITS NONTOXIC ACID ADDDITION SALTS, SAID FREE BASE HAVING THE FORMULA:
Claim 3
Dependent Claim
8 words
A CHEMICAL COMPOUND HAVING THE BASIC STRUCTURAL FORMULA:
Claim 4
Dependent Claim
8 words
A CHEMICAL COMPOUND HAVING THE BASIC STRUCTURAL FORMULA:
References Cited (Backward Citations)
US2868786A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |