US2780014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detachable bracket and spade cutter for trench digger chain
Assignee: ARPS CORP
•
Filing: 1954-05-07
•
Granted: 1957-02-05
•
Expires: 1974-05-07
Abstract
No abstract record available.
Inventors
- 👤 Bruno F Arps
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:02
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/08; E02F3/12; E02F3/14; E02F3/142
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US594896A
Cited
US1325029A
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US1244785A
Cited
US1397679A
Cited
US1568870A
Cited
US1522860A
Cited
US2211786A
Cited
US2608222A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |