US2416500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prevention of corrosion in furfural rerun systems
Assignee: Phillips Petroleum Co
•
Filing: 1945-07-26
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Granted: 1947-02-25
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Expires: 1965-07-26
Abstract
No abstract record available.
Inventors
- 👤 Scarth Virgil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:39
CPC Classifications
C; C23; C23F; C23F15/00; C23F15/005; B; B01; B01D; B01D3/00; B01D3/34; B01D3/40; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/38; C07D307/40; C07D307/46; C07D307/48
Claims Analysis
Total Claims: 0
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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) | 1950-02-24 | 1950-08-26 | 1951-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-24 | 1954-08-26 | 1955-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-24 | 1958-08-26 | 1959-02-25 | $7700.00 | Window Closed / Lapsed |