US2763941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ditch forming machine
Assignee: Guntert & Zimmerman Ltd
•
Filing: 1954-07-23
•
Granted: 1956-09-25
•
Expires: 1974-07-23
Abstract
No abstract record available.
Inventors
- 👤 Wilbur F Earley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:11
CPC Classifications
E; E02; E02F; E02F5/00; E02F5/02; E02F5/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |