US2941319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grading machine blade support
Assignee: Preco LLC
•
Filing: 1957-05-17
•
Granted: 1960-06-21
•
Expires: 1977-05-17
Abstract
No abstract record available.
Inventors
- 👤 Paul K Beemer
- 👤 Reeford P Shea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:09
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/80; E02F3/84; E02F3/841; E02F3/844; E02F3/845
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US544320A
Cited
US1864639A
Cited
US2189286A
Cited
US1936518A
Cited
US2472944A
Cited
US2846635A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |