US2528748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Granular mining machine
Assignee: IN SITU GASES Inc
•
Filing: 1945-11-14
•
Granted: 1950-11-07
•
Expires: 1965-11-14
Abstract
No abstract record available.
Inventors
- 👤 Frank C Greene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:41
CPC Classifications
E; E21; E21C; E21C27/00; E21C27/20; E21C27/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US80056A
Cited
US747869A
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US1191864A
Cited
US1200935A
Cited
US1333491A
Cited
US1937867A
Cited
US2064660A
Cited
US2320653A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |