US2787344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable oil well mast with folding gin pole
Assignee: Lee C Moore Corp
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Filing: 1954-02-10
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Granted: 1957-04-02
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Expires: 1974-02-10
Abstract
No abstract record available.
Inventors
- 👤 Homer J Woolslayer
- 👤 Calvin L Turner
- 👤 Erwin A Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:28
CPC Classifications
E; E04; E04H; E04H12/00; E04H12/18; E04H12/187; E21; E21B; E21B15/00
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) | 1960-04-01 | 1960-10-01 | 1961-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-01 | 1964-10-01 | 1965-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-01 | 1968-10-01 | 1969-04-02 | $7700.00 | Window Closed / Lapsed |