Patent US2501209A successfully refreshed from Google Patents.
US2501209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nu-phenyl-3,5-diethyl-2-propylpyridinium compounds
Assignee: Goodrich Corp
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Filing: 1947-01-21
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Granted: 1950-03-21
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Expires: 1967-01-21
Abstract
No abstract record available.
Inventors
- 👤 Craig David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:30
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0008; C08K5/0025
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
7 words
N-PHENYL-3,5-DIETHYL-2 - PROPYLPYRIDINIUM COMPOUNDS HAVING THE STRUCTURE:
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) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |