US2731741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable dredge
Assignee: Ellicott Machine Corp
•
Filing: 1950-11-02
•
Granted: 1956-01-24
•
Expires: 1970-11-02
Abstract
No abstract record available.
Inventors
- 👤 Carl P Kaufmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:20
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/88; E02F3/8833; E02F3/8841; E02F9/00; E02F9/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US154545A
Cited
US332227A
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US1619850A
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US1739326A
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US2314624A
Cited
US2384981A
Cited
GB586640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-23 | 1959-07-25 | 1960-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-23 | 1963-07-25 | 1964-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-23 | 1967-07-25 | 1968-01-24 | $7700.00 | Window Closed / Lapsed |