Patent US3271403A successfully refreshed from Google Patents.
US3271403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2, 4-dialkoxy-5, 6-hydrocarbylene-3-nitropyridines
Assignee: F Hoffmann La Roche AG
•
Filing: 1963-09-03
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Granted: 1966-09-06
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Expires: 1983-09-03
Abstract
No abstract record available.
Inventors
- 👤 Grussner Andre
- 👤 Schnider Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:32
CPC Classifications
C; C11; C11B; C11B9/00; C11B9/0069; C11B9/0092
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
COMPOUNDS OF THE FORMULA:
Claim 2
Dependent Claim
4 words
COMPOUNDS OF 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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |