US2569457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bridging plug for wells and the like
Assignee: INTERNAT CEMENTERS Inc
•
Filing: 1947-11-28
•
Granted: 1951-10-02
•
Expires: 1967-11-28
Abstract
No abstract record available.
Inventors
- 👤 Orie O Dale
- 👤 John D Chesnut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:51
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/134
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US903314A
Cited
US932766A
Cited
US1092508A
Cited
US1137205A
Cited
US1809080A
Cited
US2249172A
Cited
US2383453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-01 | 1955-04-02 | 1955-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-01 | 1959-04-02 | 1959-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-01 | 1963-04-02 | 1963-10-02 | $7700.00 | Window Closed / Lapsed |