US2608772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual purpose ground working implement
Assignee: Individual
•
Filing: 1947-03-17
•
Granted: 1952-09-02
•
Expires: 1967-03-17
Abstract
No abstract record available.
Inventors
- 👤 Royal B Laird
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:10
CPC Classifications
E; E02; E02F; E02F5/00; E02F5/30; E02F5/32; E02F3/00; E02F3/04; E02F3/76; E02F3/80; E02F3/815
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US178948A
Cited
US1691153A
Cited
US1861762A
Cited
US2076939A
Cited
US2227624A
Cited
US2262415A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-02 | 1956-03-03 | 1956-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-02 | 1960-03-03 | 1960-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-02 | 1964-03-03 | 1964-09-02 | $7700.00 | Window Closed / Lapsed |