US2710180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chuck and bit assembly for channeling stone
Assignee: Individual
•
Filing: 1953-01-07
•
Granted: 1955-06-07
•
Expires: 1973-01-07
Abstract
No abstract record available.
Inventors
- 👤 Frank F Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:51
CPC Classifications
E; E21; E21C; E21C25/00; E21C25/62; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17931; Y10T279/17941; Y10T407/00; Y10T407/22; Y10T407/2202
Claims Analysis
Total Claims: 0
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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) | 1958-06-06 | 1958-12-06 | 1959-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-06 | 1962-12-06 | 1963-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-06 | 1966-12-06 | 1967-06-07 | $7700.00 | Window Closed / Lapsed |