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Patent US2468756A successfully refreshed from Google Patents.
US2468756A
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Hydrogen fluoride recovery process
Assignee: Universal Oil Products Co
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Filing: 1944-03-24
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Granted: 1949-05-03
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Expires: 1964-03-24
Abstract
No abstract record available.
Inventors
- 👤 John O Iverson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:44
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06; C; C01; C01B; C01B7/00; C01B7/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1792234A
Cited
US1924196A
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US2267730A
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US2322800A
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US2317901A
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US2320629A
Cited
US2347317A
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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) | 1952-05-02 | 1952-11-01 | 1953-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-02 | 1956-11-01 | 1957-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-02 | 1960-11-01 | 1961-05-03 | $7700.00 | Window Closed / Lapsed |