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US2426558A
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Process for removal of hydrogen fluoride from nonaqueous fluids and porous body for use in such process
Assignee: Harshaw Chemical Co
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Filing: 1945-06-02
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Granted: 1947-08-26
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Expires: 1965-06-02
Abstract
No abstract record available.
Inventors
- 👤 Kenneth E Long
- 👤 Harold W Cromer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:44
CPC Classifications
C; C10; C10G; C10G29/00; C10G29/06; C10G29/12; B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/68; C01; C01B; C01B7/00; C01B7/19; C01B7/191
Claims Analysis
Total Claims: 0
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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) | 1950-08-25 | 1951-02-24 | 1951-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-25 | 1955-02-24 | 1955-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-25 | 1959-02-24 | 1959-08-26 | $7700.00 | Window Closed / Lapsed |