US2986960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gun drill and the method of producing the same
Assignee: National Twist Drill and Tool Co
•
Filing: 1959-06-15
•
Granted: 1961-06-06
•
Expires: 1979-06-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Carl J Oxford
- 👤 Marvin W Mitzelfeld
- 👤 Jr Daniel J Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:44
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/04; B23B51/0486; B23P; B23P15/00; B23P15/28; B23P15/32; B23B51/06; B23B51/063; B23B51/066; Y; Y10; Y10S; Y10S408/00; Y10S408/705; Y10T; Y10T408/00; Y10T408/44; Y10T408/45; Y10T408/455
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1189727A
Cited
US1784932A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |