US2379333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable well-servicing apparatus
Assignee: Internat Derrick & Equipment C
•
Filing: 1943-09-13
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Granted: 1945-06-26
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Expires: 1963-09-13
Abstract
No abstract record available.
Inventors
- 👤 Clifford R Athy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:20
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02; E21B7/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-06-25 | 1948-12-25 | 1949-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-06-25 | 1952-12-25 | 1953-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-06-25 | 1956-12-25 | 1957-06-26 | $7700.00 | Window Closed / Lapsed |