US2747307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable mechanism for endless conveyor type ditching machine
Assignee: Individual
•
Filing: 1951-04-23
•
Granted: 1956-05-29
•
Expires: 1971-04-23
Abstract
No abstract record available.
Inventors
- 👤 Mark C Griffin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:36
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/08; E02F3/10; E02F3/082; E02F3/086
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US796747A
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US884960A
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US1545805A
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US1762569A
Cited
US1804587A
Cited
US2381425A
Cited
US2556610A
Cited
US2636288A
Cited
US2550071A
Cited
US2648145A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |