US2640542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sidewall sample taking device
Assignee: Individual
•
Filing: 1947-09-11
•
Granted: 1953-06-02
•
Expires: 1967-09-11
Abstract
No abstract record available.
Inventors
- 👤 Luther E Brown
- 👤 Ollin W Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:56
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/08; E21B49/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2214551A
Cited
US2229635A
Cited
US2231425A
Cited
US2313369A
Cited
US2404825A
Cited
US2441894A
Cited
US2308387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |