US2059629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well bailer
Assignee: Individual
•
Filing: 1933-04-22
•
Granted: 1936-11-03
•
Expires: 1953-04-22
Abstract
No abstract record available.
Inventors
- 👤 Weldon C Erwin
- 👤 Cecil H Sweet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:18
CPC Classifications
E; E21; E21B; E21B27/00; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1789; Y10T137/8593; Y10T137/87917; Y10T137/87925; Y10T137/88054
Claims Analysis
Total Claims: 0
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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) | 1939-11-03 | 1940-05-04 | 1940-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-11-03 | 1944-05-04 | 1944-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-11-03 | 1948-05-04 | 1948-11-03 | $7700.00 | Window Closed / Lapsed |