US2490975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic conversion of hydrocarbons
Assignee: Phillips Petroleum Co
•
Filing: 1946-09-19
•
Granted: 1949-12-13
•
Expires: 1966-09-19
Abstract
No abstract record available.
Inventors
- 👤 Eugene V Mathy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:04
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; B; B01; B01J; B01J38/00; B01J38/04; B01J38/12; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/901; Y10S585/902; 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)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |