Patent US2431685A successfully refreshed from Google Patents.
US2431685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for alkylation of an organic compound with an olefin in presence of hydrofluoric acid
Assignee: Phillips Petroleum Co
•
Filing: 1944-08-28
•
Granted: 1947-12-02
•
Expires: 1964-08-28
Abstract
No abstract record available.
Inventors
- 👤 George N Cade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:09
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; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1438123A
Cited
US2014740A
Cited
US2135455A
Cited
US2286183A
Cited
US2322800A
Cited
US2317901A
Cited
US2320629A
Cited
US2317694A
Cited
US2384294A
Cited
US2342677A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-01 | 1951-06-02 | 1951-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-01 | 1955-06-02 | 1955-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-01 | 1959-06-02 | 1959-12-02 | $7700.00 | Window Closed / Lapsed |