US2926786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable gold concentrating device
Assignee: Individual
•
Filing: 1957-06-17
•
Granted: 1960-03-01
•
Expires: 1977-06-17
Abstract
No abstract record available.
Inventors
- 👤 John B Craft
- 👤 John S Youtcheff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:27
CPC Classifications
B; B03; B03B; B03B5/00; B03B5/62; B03B5/02; B03B5/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US73160A
Cited
US416626A
Cited
US436181A
Cited
US579373A
Cited
US1571295A
Cited
GB189514960A
Cited
US677537A
Cited
US776662A
Cited
US920296A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-01 | 1963-08-31 | 1964-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-01 | 1967-08-31 | 1968-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-01 | 1971-08-31 | 1972-03-01 | $7700.00 | Window Closed / Lapsed |