Patent US2191403A successfully refreshed from Google Patents.
US2191403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for filtering
Assignee: Sunoco Inc
•
Filing: 1938-04-30
•
Granted: 1940-02-20
•
Expires: 1958-04-30
Abstract
No abstract record available.
Inventors
- 👤 Leon A Tarbox
- 👤 Barcus William Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:29
CPC Classifications
C; C10; C10M; C10M175/00; C10M175/0058; C10M175/0008; C10M2201/00; C10M2201/10; C10M2201/102; C10M2201/103
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-02-19 | 1943-08-21 | 1944-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-02-19 | 1947-08-21 | 1948-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-02-19 | 1951-08-21 | 1952-02-20 | $7700.00 | Window Closed / Lapsed |