Patent US4554665A successfully refreshed from Google Patents.
Patent US3949376A successfully refreshed from Google Patents.
Patent US3572181A successfully refreshed from Google Patents.
US3572181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Angularity indicating drilling attachment
Assignee: Individual
•
Filing: 1968-09-06
•
Granted: 1971-03-23
•
Expires: 1988-09-06
Abstract
Abstract AN ATTACHMENT FOR A DRILLING APPARATUS TO MAINTAIN THE DRILL AT A PRE-SELECTED ANGLE. INDICATORS, RESPONSIVE TO CONTACT BETWEEN THE DRILLING ATTACHMENT AND THE WORKPIECE, VERIFY ANGULAR ALIGNMENT.
Inventors
- 👤 Martin S Schlegel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:41
CPC Classifications
B; B23; B23B; B23B49/00; B25; B25H; B25H1/00; B25H1/0021; B25H1/0078; B25H1/0085; Y; Y10; Y10T; Y10T408/00; Y10T408/21; Y10T408/96
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |