US2530308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for determining movability of members in wells
Assignee: Individual
•
Filing: 1945-09-28
•
Granted: 1950-11-14
•
Expires: 1965-09-28
Abstract
No abstract record available.
Inventors
- 👤 Philip W Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:10
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1654819A
Cited
US2092316A
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US2040874A
Cited
US2045474A
Cited
US2300384A
Cited
US2396935A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-13 | 1954-05-15 | 1954-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-13 | 1958-05-15 | 1958-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-13 | 1962-05-15 | 1962-11-14 | $7700.00 | Window Closed / Lapsed |