US2633331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for preparing a well casing for sidetrack drilling
Assignee: Individual
•
Filing: 1948-09-07
•
Granted: 1953-03-31
•
Expires: 1968-09-07
Abstract
No abstract record available.
Inventors
- 👤 Hampton Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:14
CPC Classifications
E; E21; E21B; E21B29/00; E21B29/06; E21B17/00; E21B17/02; E21B17/04; E21B17/05; E21B7/00; E21B7/04; E21B7/06; E21B7/061
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1835227A
Cited
US2081294A
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US2167194A
Cited
US2100684A
Cited
US2227347A
Cited
US2316409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-30 | 1956-09-29 | 1957-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-30 | 1960-09-29 | 1961-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-30 | 1964-09-29 | 1965-03-31 | $7700.00 | Window Closed / Lapsed |