US3006424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock drill bits and cutting inserts therefor
Assignee: Sandvik AB
•
Filing: 1959-04-20
•
Granted: 1961-10-31
•
Expires: 1979-04-20
Abstract
No abstract record available.
Inventors
- 👤 Dahlin Curt Vilhelm
- 👤 Kaarik Kaljo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:37
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2735656A
Cited
US993972A
Cited
US1094063A
Cited
US1428415A
Cited
GB203039A
Cited
US2565333A
Cited
US2529788A
Cited
US2689108A
Cited
US2628821A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-30 | 1965-05-01 | 1965-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-30 | 1969-05-01 | 1969-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-30 | 1973-05-01 | 1973-10-31 | $7700.00 | Window Closed / Lapsed |