US2419796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylation process
Assignee: Phillips Petroleum Co
•
Filing: 1942-07-13
•
Granted: 1947-04-29
•
Expires: 1962-07-13
Abstract
No abstract record available.
Inventors
- 👤 Walter A Schulze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:04
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; B; B01; B01J; B01J21/00; B01J21/12; C07C2521/00; C07C2521/12; 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)
US1953702A
Cited
GB316951A
Cited
US2115884A
Cited
US2031600A
Cited
US2016271A
Cited
GB456637A
Cited
US2245734A
Cited
US2147985A
Cited
US2129649A
Cited
GB504614A
Cited
US2241430A
Cited
US2268110A
Cited
US2215305A
Cited
US2317803A
Cited
US2259723A
Cited
US2349904A
Cited
US2329858A
Cited
US2290211A
Cited
US2364762A
Cited
US2352200A
Cited
US2384505A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-28 | 1950-10-28 | 1951-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-28 | 1954-10-28 | 1955-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-28 | 1958-10-28 | 1959-04-29 | $7700.00 | Window Closed / Lapsed |