Patent US3328402A successfully refreshed from Google Patents.
US3328402A
Expired / Lapsed
US
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Pyrazine derivatives
Assignee: Firmenich SA
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Filing: 1964-02-21
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Granted: 1967-06-27
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Expires: 1984-02-21
Abstract
No abstract record available.
Inventors
- 👤 Winter Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:03
CPC Classifications
C; C11; C11B; C11B9/00; C11B9/0069; C11B9/0092; A; A23; A23L; A23L27/00; A23L27/20; A23L27/205; A23L27/2054; C07; C07D; C07D241/00; C07D241/02; C07D241/10; C07D241/14; C07D241/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A COMPOUND REPRESENTED BY THE GENERAL FORMULA 2-(H3C-S-),3-R1,5-R3,6-R2-PYRAZINE WHEREIN ONE OF THE SYMBOLS R1, R2 AND R3 REPRESENTS A METHYL RADICAL, THE OTHER TWO REPRESENTING HYDROGEN.
Claim 2
Dependent Claim
26 words
A COMPOUND REPRESENTED BY THE GENERAL FORMULA 2-(H3C-S-),3-R1,5-R3,6-R2-PYRAZINE WHEREIN ONE OF THE SYMBOLS R1, R2 AND R3 REPRESENTS A METHYL RADICAL, THE OTHER TWO REPRESENTING HYDROGEN.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |