US2049172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mining apparatus
Assignee: Sullivan Machinery Co
•
Filing: 1933-12-22
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Granted: 1936-07-28
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Expires: 1953-12-22
Abstract
No abstract record available.
Inventors
- 👤 Robert C Osgood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:04
CPC Classifications
B; B28; B28D; B28D1/00; B28D1/02; B28D1/12; B28D1/124; B28D1/08; B28D1/088; E; E21; E21C; E21C25/00; E21C25/54; Y; Y10; Y10T; Y10T83/00; Y10T83/849; Y10T83/853; Y10T83/869; Y10T83/8717; Y10T83/929; Y10T83/9292
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) | 1939-07-28 | 1940-01-27 | 1940-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-07-28 | 1944-01-27 | 1944-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-07-28 | 1948-01-27 | 1948-07-28 | $7700.00 | Window Closed / Lapsed |