Patent US2898786A successfully refreshed from Google Patents.
US2898786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blind hole drill
Assignee: Individual
•
Filing: 1955-12-14
•
Granted: 1959-08-11
•
Expires: 1975-12-14
Abstract
No abstract record available.
Inventors
- 👤 John R Willingham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:03
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/06; B23B51/063; B23B51/04; B23B51/0486; Y; Y10; Y10T; Y10T408/00; Y10T408/44; Y10T408/45; Y10T408/455; Y10T408/89; Y10T408/899; Y10T408/907
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1379853A
Cited
US2186725A
Cited
US2252168A
Cited
US2325535A
Cited
DE848140C
Cited
GB593622A
Cited
US2610529A
Cited
US2674908A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |