US2434239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing oil
Assignee: Individual
•
Filing: 1944-06-15
•
Granted: 1948-01-06
•
Expires: 1964-06-15
Abstract
No abstract record available.
Inventors
- 👤 John A Zublin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:51
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/02; E21B43/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US731130A
Cited
US767443A
Cited
US837433A
Cited
US1394192A
Cited
US1816260A
Cited
US2171416A
Cited
US2280851A
Cited
US2271005A
Cited
US2354570A
Cited
US2360200A
Cited
US2385298A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-05 | 1951-07-07 | 1952-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-05 | 1955-07-07 | 1956-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-05 | 1959-07-07 | 1960-01-06 | $7700.00 | Window Closed / Lapsed |