Patent US2216989A successfully refreshed from Google Patents.
US2216989A
Expired / Lapsed
US
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Taking mine samples
Assignee: Individual
•
Filing: 1938-04-09
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Granted: 1940-10-08
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Expires: 1958-04-09
Abstract
No abstract record available.
Inventors
- 👤 Clair Matilda Elliott St
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:36
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/04; B; B23; B23D; B23D59/00; B23D59/02; B27; B27B; B27B5/00; B27B5/29; B27B5/30; B27B5/34; B28; B28D; B28D1/00; B28D1/02; B28D1/04; B28D1/048; E; E21; E21F; E21F17/00
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) | 1943-10-08 | 1944-04-08 | 1944-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-10-08 | 1948-04-08 | 1948-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-10-08 | 1952-04-08 | 1952-10-08 | $7700.00 | Window Closed / Lapsed |