US3028693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boom construction for ditching machine
Assignee: Individual
•
Filing: 1960-04-14
•
Granted: 1962-04-10
•
Expires: 1980-04-14
Abstract
No abstract record available.
Inventors
- 👤 Gus E Malzahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:30
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/08; E02F3/10; E02F3/12; E02F3/14; E02F3/146
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US405511A
Cited
US2714262A
Cited
US2247825A
Cited
US2686981A
Cited
US2667709A
Cited
US2702485A
Cited
US2764031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |