Patent US2623595A successfully refreshed from Google Patents.
US2623595A
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US
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Well completion
Assignee: A A BUCHANAN
•
Filing: 1945-10-23
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Granted: 1952-12-30
•
Expires: 1965-10-23
Abstract
No abstract record available.
Inventors
- 👤 Thomas S West
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:08
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/02; E21B43/04; E21B27/00; E21B27/02
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |