US2427009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic cracking of hydrocarbons in the presence of hydrogen fluoride and boron fluoride
Assignee: Standard Oil Co
•
Filing: 1944-08-14
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Granted: 1947-09-09
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Expires: 1964-08-14
Abstract
No abstract record available.
Inventors
- 👤 Arthur P Lien
- 👤 Bernard L Evering
- 👤 Bernard H Shoemaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:41
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/08; C10G69/00; C10G69/02; C10G69/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2172146A
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US2216274A
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US2357495A
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US2320629A
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US2343744A
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US2343841A
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US2405995A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-08 | 1951-03-10 | 1951-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-08 | 1955-03-10 | 1955-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-08 | 1959-03-10 | 1959-09-09 | $7700.00 | Window Closed / Lapsed |