Patent US2763941A successfully refreshed from Google Patents.
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 18:28
CPC Classifications
E; E02; E02F; E02F5/00; E02F5/02; E02F5/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US336183A
Cited
US1239474A
Cited
US1407969A
Cited
US1347860A
Cited
US1472562A
Cited
US1477940A
Cited
US1519897A
Cited
US1762569A
Cited
US1863504A
Cited
US2627681A
Cited
US2539689A
Cited
US2686981A
Cited
US2617314A
Cited
GB693725A
Cited
US2631718A
Cited
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 |