US2589080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power-operated telescoping mast and braces
Assignee: STAR DRILLING MACHINE Co
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Filing: 1949-11-05
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Granted: 1952-03-11
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Expires: 1969-11-05
Abstract
No abstract record available.
Inventors
- 👤 Heinish George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:32
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02; E21B7/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-11 | 1955-09-10 | 1956-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-11 | 1959-09-10 | 1960-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-11 | 1963-09-10 | 1964-03-11 | $7700.00 | Window Closed / Lapsed |