US2829544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Countersinking and counterboring tool
Assignee: Weldon Tool Co
•
Filing: 1953-12-07
•
Granted: 1958-04-08
•
Expires: 1973-12-07
Abstract
No abstract record available.
Inventors
- 👤 Walter C Bergstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:48
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/10; B23B51/109; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/905; Y10T408/906; Y10T408/9065
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |