US2984024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ditching machine
Assignee: Individual
•
Filing: 1958-09-19
•
Granted: 1961-05-16
•
Expires: 1978-09-19
Abstract
No abstract record available.
Inventors
- 👤 Louis J Prenner
- 👤 Andrew B Marello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:17
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/18; E02F3/20; E02F3/188
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1318920A
Cited
US1756495A
Cited
US2603136A
Cited
US2585296A
Cited
US2701941A
Cited
US2688832A
Cited
FR1081708A
Cited
US2781624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |