Patent US2193309A successfully refreshed from Google Patents.
US2193309A
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Method and apparatus for flowing wells
Assignee: Individual
•
Filing: 1935-08-29
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Granted: 1940-03-12
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Expires: 1955-08-29
Abstract
No abstract record available.
Inventors
- 👤 Eakin L Wheless
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:08
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/12; Y; Y10; Y10S; Y10S585/00; Y10S585/919; Y10S585/921; Y10S585/949; Y10S585/95
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) | 1943-03-12 | 1943-09-11 | 1944-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-03-12 | 1947-09-11 | 1948-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-03-12 | 1951-09-11 | 1952-03-12 | $7700.00 | Window Closed / Lapsed |