US2419504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boron fluoride recovery process
Assignee: Phillips Petroleum Co
•
Filing: 1942-12-07
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Granted: 1947-04-22
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Expires: 1962-12-07
Abstract
No abstract record available.
Inventors
- 👤 Walter A Schulze
- 👤 Axe William Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:34
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06; C; C10; C10G; C10G11/00; C10G11/02; C10G11/08
Claims Analysis
Total Claims: 0
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US2343744A
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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) | 1950-04-21 | 1950-10-21 | 1951-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-21 | 1954-10-21 | 1955-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-21 | 1958-10-21 | 1959-04-22 | $7700.00 | Window Closed / Lapsed |