US2438570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of toluene by catalytic cracking of monoalkyl benzenes
Assignee: Universal Oil Products Co
•
Filing: 1945-06-28
•
Granted: 1948-03-30
•
Expires: 1965-06-28
Abstract
No abstract record available.
Inventors
- 👤 William J Mattox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:32
CPC Classifications
C; C07; C07C; C07C4/00; C07C4/08; C07C4/12; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/16; C07C2523/24; C07C2523/26; C07C2523/28
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) | 1951-03-30 | 1951-09-29 | 1952-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-30 | 1955-09-29 | 1956-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-30 | 1959-09-29 | 1960-03-30 | $7700.00 | Window Closed / Lapsed |