US3901886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certain derivatives of pyrazinylmalonates
Assignee: Janssen Pharmaceuticals Inc
•
Filing: 1972-11-17
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Granted: 1975-08-26
•
Expires: 1992-11-17
Abstract
Abstract The compounds are of the class of pyrazine, arylpyrazine, diphenylpyrazine, and cycloalkylpyrazine malonates, acetates, acetamides, and acetic acids, useful for their ultraviolet light absorption properties.
Inventors
- 👤 Norman Schwartz
- 👤 Richard J Mohrbacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:45
CPC Classifications
C; C07; C07D; C07D413/00; C07D413/02; C07D413/06; C07D241/00; C07D241/02; C07D241/10; C07D241/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
13 words
A MEMBER SELECTED FROM THE GROUP CONSISTING OF A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
13 words
A MEMBER SELECTED FROM THE GROUP CONSISTING OF A COMPOUND OF THE FORMULA:
Claim 3
Dependent Claim
3 words
Diethyl Alpha -methyl-5-phenylpyrazinylmalonate.
Claim 4
Dependent Claim
3 words
Diethyl Alpha -methyl-5-phenylpyrazinylmalonate.
Claim 5
Dependent Claim
3 words
Diethyl Alpha -ethyl-5-phenylpyrazinylmalonate.
Claim 6
Dependent Claim
3 words
Diethyl Alpha -ethyl-5-phenylpyrazinylmalonate.
Claim 7
Dependent Claim
4 words
Diethyl 5-(p-chlorophenyl)- Alpha -methylpyrazinylmalonate.
Claim 8
Dependent Claim
4 words
Diethyl 5-(p-chlorophenyl)- Alpha -methylpyrazinylmalonate.
Claim 9
Dependent Claim
3 words
Diethyl Alpha -methyl-5-cyclohexylpyrazinylmalonate.
Claim 10
Dependent Claim
3 words
Diethyl Alpha -methyl-5-cyclohexylpyrazinylmalonate.
References Cited (Backward Citations)
US3006918A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |