US2643858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soil sampling machine
Assignee: UTAH SCIENT RES FOUNDATION
•
Filing: 1948-06-14
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Granted: 1953-06-30
•
Expires: 1968-06-14
Abstract
No abstract record available.
Inventors
- 👤 James A Hardman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:08
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02; E21B7/027; E21B19/00; E21B19/08; E21B19/084; E21B25/00; E21B25/10; E21B44/00
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |