Patent US2495439A successfully refreshed from Google Patents.
US2495439A
Expired / Lapsed
US
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Side wall sample taker
Assignee: Individual
•
Filing: 1945-08-08
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Granted: 1950-01-24
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Expires: 1965-08-08
Abstract
No abstract record available.
Inventors
- 👤 Neville B Brimble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:47
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/02; E21B49/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1627842A
Cited
US2147491A
Cited
US2170284A
Cited
US2324682A
Cited
US2386514A
Cited
US2401893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-23 | 1953-07-25 | 1954-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-23 | 1957-07-25 | 1958-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-23 | 1961-07-25 | 1962-01-24 | $7700.00 | Window Closed / Lapsed |