US2230712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well bridging plug
Assignee: Individual
•
Filing: 1940-04-11
•
Granted: 1941-02-04
•
Expires: 1960-04-11
Abstract
No abstract record available.
Inventors
- 👤 Bendeler William
- 👤 Howard Clifford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:25
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/128; E21B33/13; E21B33/134; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44641; Y10T24/44684; Y10T24/44692
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) | 1944-02-04 | 1944-08-05 | 1945-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-02-04 | 1948-08-05 | 1949-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-02-04 | 1952-08-05 | 1953-02-04 | $7700.00 | Window Closed / Lapsed |