US2835668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyridylethylated benzoxazinediones and process for preparation
Assignee: US Vitamin Corp
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Filing: 1956-06-22
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Granted: 1958-05-20
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Expires: 1976-06-22
Abstract
No abstract record available.
Inventors
- 👤 Seymour L Shapiro
- 👤 Freedman Louis
- 👤 Ira M Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:10
CPC Classifications
C; C07; C07D; C07D413/00; C07D413/02; C07D413/06; C07D265/00; C07D265/04; C07D265/12; C07D265/14; C07D265/24; C07D265/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
AS A COMPOSITION OF MATTER A MEMBER OF THE GROUP CONSISTING OF A PYRIDYLETHYLATED BENZOXAZINEDIONE HAVING THE FORMULA WHEREIN PY IS A MEMBER OF THE GROUP CONSISTING OF 2PYRIDYL, ALKYL-SUBSTITUTED-2-PYRIDYL, SAID ALKYL HAVING A CARBON CONTENT OF 1-2, AND 4-PYRIDYL, AND R IS A MEMBER OF THE GROUP CONSISTING OF HYDROGEN, HALOGEN, HYDROXYL, ALKYL HAVING A CARBON CONTENT OF 1-2, METHOXYL AND ARYL CONTAINING NOT MORE THAN 6 CARBON ATOMS, AND PHARMACEUTICALLY ACCEPTABLE ACID ADDITION AND QUATERNARY AMMONIUM SALTS THEREOF.
Claim 2
Dependent Claim
80 words
AS A COMPOSITION OF MATTER A MEMBER OF THE GROUP CONSISTING OF A PYRIDYLETHYLATED BENZOXAZINEDIONE HAVING THE FORMULA WHEREIN PY IS A MEMBER OF THE GROUP CONSISTING OF 2PYRIDYL, ALKYL-SUBSTITUTED-2-PYRIDYL, SAID ALKYL HAVING A CARBON CONTENT OF 1-2, AND 4-PYRIDYL, AND R IS A MEMBER OF THE GROUP CONSISTING OF HYDROGEN, HALOGEN, HYDROXYL, ALKYL HAVING A CARBON CONTENT OF 1-2, METHOXYL AND ARYL CONTAINING NOT MORE THAN 6 CARBON ATOMS, AND PHARMACEUTICALLY ACCEPTABLE ACID ADDITION AND QUATERNARY AMMONIUM SALTS THEREOF.
References Cited (Backward Citations)
US2476559A
Cited
US2714105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |