US2425745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of hydrogen fluoride from gases
Assignee: Phillips Petroleum Co
•
Filing: 1944-06-10
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Granted: 1947-08-19
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Expires: 1964-06-10
Abstract
No abstract record available.
Inventors
- 👤 Ancel B Leonard
- 👤 George R Hettick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:22
CPC Classifications
C; C07; C07C; C07C9/00; C07C9/14; C07C9/16; B; B01; B01J; B01J27/00; B01J27/06; C07C2/00; C07C2/54; C07C2/56; C07C2/58; C07C2/62; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1206; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2322800A
Cited
US2317901A
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US2307799A
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US2347317A
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US2372338A
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US2342677A
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US2371341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-18 | 1951-02-17 | 1951-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-18 | 1955-02-17 | 1955-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-18 | 1959-02-17 | 1959-08-19 | $7700.00 | Window Closed / Lapsed |