US2834577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock drill front end with dust collecting device
Assignee: CLEVELAND ROCK DRILL DIVISION
•
Filing: 1955-03-23
•
Granted: 1958-05-13
•
Expires: 1975-03-23
Abstract
No abstract record available.
Inventors
- 👤 Jacob E Feucht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:45
CPC Classifications
B; B23; B23Q; B23Q1/00; B23Q1/0009; B23Q1/0018; B23Q1/0027; E; E21; E21B; E21B21/00; E21B21/01; E21B21/015; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17042
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |