US2477401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Excavator
Assignee: Individual
•
Filing: 1945-05-25
•
Granted: 1949-07-26
•
Expires: 1965-05-25
Abstract
No abstract record available.
Inventors
- 👤 Roy O Billings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:51
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/40; E02F3/413; E02F3/4135
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US767536A
Cited
US1327324A
Cited
US1345304A
Cited
US1639735A
Cited
US1858903A
Cited
US2030045A
Cited
US2378605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-25 | 1953-01-24 | 1953-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-25 | 1957-01-24 | 1957-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-25 | 1961-01-24 | 1961-07-26 | $7700.00 | Window Closed / Lapsed |