US2506799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casing whipstock
Assignee: Eastman Oil Well Survey Co
•
Filing: 1945-01-22
•
Granted: 1950-05-09
•
Expires: 1965-01-22
Abstract
No abstract record available.
Inventors
- 👤 Herman G Livingston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:32
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/04; E21B7/06; E21B7/061
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1502428A
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US1529848A
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US1625600A
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US1738819A
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US2102055A
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US2132061A
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US2158329A
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US2107420A
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US2207920A
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US2234438A
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US2334747A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |