Patent US2437544A successfully refreshed from Google Patents.
US2437544A
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US
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Hydrofluoric acid alkylation process
Assignee: Pure Oil Co
•
Filing: 1944-08-02
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Granted: 1948-03-09
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Expires: 1964-08-02
Abstract
No abstract record available.
Inventors
- 👤 Milton M Marisic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:55
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/56; C07C2/58; C07C2/62; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1206
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2001910A
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US2322800A
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US2259723A
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US2317901A
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US2325052A
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US2320629A
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US2361465A
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US2365426A
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US2379368A
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US2378439A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-09 | 1951-09-08 | 1952-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-09 | 1955-09-08 | 1956-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-09 | 1959-09-08 | 1960-03-09 | $7700.00 | Window Closed / Lapsed |