US2619393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well swab
Assignee: Individual
•
Filing: 1947-10-20
•
Granted: 1952-11-25
•
Expires: 1967-10-20
Abstract
No abstract record available.
Inventors
- 👤 Robert A Wilson
- 👤 James A Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:50
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1527956A
Cited
US1520400A
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US1825185A
Cited
US1757005A
Cited
US1792898A
Cited
US2144997A
Cited
US2352812A
Cited
US2456551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-25 | 1956-05-26 | 1956-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-25 | 1960-05-26 | 1960-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-25 | 1964-05-26 | 1964-11-25 | $7700.00 | Window Closed / Lapsed |