US2888247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock drill cutting insert of sintered hard metal
Assignee: Sandvik AB
•
Filing: 1956-12-03
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Granted: 1959-05-26
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Expires: 1976-12-03
Abstract
No abstract record available.
Inventors
- 👤 Haglund Didrik Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:01
CPC Classifications
B; B22; B22F; B22F7/00; B22F7/06; E; E21; E21B; E21B10/00; E21B10/46; E21B10/58; B22F5/00; B22F2005/001; B22F2999/00; Y; Y10; Y10T; Y10T407/00; Y10T407/26; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/12139
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB634743A
Cited
US2582231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-25 | 1962-11-24 | 1963-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-25 | 1966-11-24 | 1967-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-25 | 1970-11-24 | 1971-05-26 | $7700.00 | Window Closed / Lapsed |