US2447194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tetrahydropyrane-4: 4-dicarboxylic acid bis-diethylamide
Assignee: Novartis AG
•
Filing: 1943-10-15
•
Granted: 1948-08-17
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Expires: 1963-10-15
Abstract
No abstract record available.
Inventors
- 👤 Martin Henry
- 👤 Gysin Hans
- 👤 Zaeslin Hans
- 👤 Margot Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:33
CPC Classifications
C; C07; C07D; C07D309/00; C07D309/02; C07D309/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2130948A
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US2304475A
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US2310873A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-17 | 1952-02-16 | 1952-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-17 | 1956-02-16 | 1956-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-17 | 1960-02-16 | 1960-08-17 | $7700.00 | Window Closed / Lapsed |