US2554780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blade protector device
Assignee: Reed Roller Bit Co
•
Filing: 1947-10-18
•
Granted: 1951-05-29
•
Expires: 1967-10-18
Abstract
No abstract record available.
Inventors
- 👤 Charles C Goolsbee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:49
CPC Classifications
E; E21; E21B; E21B12/00; E21B12/04; E21B10/00; E21B10/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US326661A
Cited
US1038896A
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US1109044A
Cited
US1528369A
Cited
US1652283A
Cited
US1882268A
Cited
US1830074A
Cited
US1830133A
Cited
US1945160A
Cited
US2053707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |