US2630723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill head
Assignee: New Britain Machine Co
•
Filing: 1947-08-30
•
Granted: 1953-03-10
•
Expires: 1967-08-30
Abstract
No abstract record available.
Inventors
- 👤 George O Gridley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:22
CPC Classifications
B; B23; B23B; B23B47/00; B23B47/34; Y; Y10; Y10T; Y10T408/00; Y10T408/23; Y10T74/00; Y10T74/18; Y10T74/18024
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) | 1956-03-09 | 1956-09-08 | 1957-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-09 | 1960-09-08 | 1961-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-09 | 1964-09-08 | 1965-03-10 | $7700.00 | Window Closed / Lapsed |