US667194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil-well pipe and casing-spear.
Assignee: GRANT WISEMAN
•
Filing: 1900-05-14
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Granted: 1901-02-05
•
Expires: 1920-05-14
Abstract
No abstract record available.
Inventors
- 👤 Emmett R Curtin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:14
CPC Classifications
E; E21; E21B; E21B29/00; E21B29/002; E21B29/005
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) | 1904-02-05 | 1904-08-06 | 1905-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1908-02-05 | 1908-08-06 | 1909-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1912-02-05 | 1912-08-06 | 1913-02-05 | $7700.00 | Window Closed / Lapsed |