US2454615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic cracking of hydrocarbons
Assignee: Pan American Refining Corp
•
Filing: 1943-11-12
•
Granted: 1948-11-23
•
Expires: 1963-11-12
Abstract
No abstract record available.
Inventors
- 👤 Jr John A Ridgway
- 👤 Hill Philip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:28
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; H; H04; H04N; H04N5/00; H04N5/04; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/905
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2172146A
Cited
US2318226A
Cited
US2265870A
Cited
US2266012A
Cited
US2267730A
Cited
US2325122A
Cited
US2357495A
Cited
US2347317A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-23 | 1952-05-24 | 1952-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-23 | 1956-05-24 | 1956-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-23 | 1960-05-24 | 1960-11-23 | $7700.00 | Window Closed / Lapsed |