US2566562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scraper and backfilling blade attachment for tractors
Assignee: Individual
•
Filing: 1949-04-07
•
Granted: 1951-09-04
•
Expires: 1969-04-07
Abstract
No abstract record available.
Inventors
- 👤 Olga M Hale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:09
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/80; E02F3/815; E02F3/8152
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US945787A
Cited
US1974190A
Cited
US2309750A
Cited
US2379469A
Cited
US2433019A
Cited
US2443884A
Cited
US2434818A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-03 | 1955-03-05 | 1955-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-03 | 1959-03-05 | 1959-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-03 | 1963-03-05 | 1963-09-04 | $7700.00 | Window Closed / Lapsed |