US2519288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil well hook
Assignee: Individual
•
Filing: 1947-07-23
•
Granted: 1950-08-15
•
Expires: 1967-07-23
Abstract
No abstract record available.
Inventors
- 👤 Claude M Roberson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:44
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/02; E21B19/04; Y; Y10; Y10T; Y10T24/00; Y10T24/45; Y10T24/45225; Y10T24/4588; Y10T24/45885; Y10T24/4589
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1806908A
Cited
US679421A
Cited
US1657260A
Cited
US2158373A
Cited
US2215049A
Cited
US2242707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-14 | 1954-02-13 | 1954-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-14 | 1958-02-13 | 1958-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-14 | 1962-02-13 | 1962-08-15 | $7700.00 | Window Closed / Lapsed |