Patent US2131373A successfully refreshed from Google Patents.
US2131373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Earth cutting, digging, and moving machine
Assignee: Individual
•
Filing: 1937-03-24
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Granted: 1938-09-27
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Expires: 1957-03-24
Abstract
No abstract record available.
Inventors
- 👤 Ernest A Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:54
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/40; E02F3/402; E02F3/405; Y; Y10; Y10S; Y10S37/00; Y10S37/904; Y10S414/00; Y10S414/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1941-09-26 | 1942-03-28 | 1942-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-09-26 | 1946-03-28 | 1946-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-09-26 | 1950-03-28 | 1950-09-27 | $7700.00 | Window Closed / Lapsed |