US2431166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic alkylation of hydrocarbons
Assignee: Phillips Petroleum Co
•
Filing: 1943-04-05
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Granted: 1947-11-18
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Expires: 1963-04-05
Abstract
No abstract record available.
Inventors
- 👤 Buell Charles Keith
- 👤 Jr Robert Guy Boatright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:44
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2521/00; C07C2521/12; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/954
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-17 | 1951-05-19 | 1951-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-17 | 1955-05-19 | 1955-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-17 | 1959-05-19 | 1959-11-18 | $7700.00 | Window Closed / Lapsed |