US3388935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Threaded drill rod element
Assignee: Sandvik AB
•
Filing: 1967-03-27
•
Granted: 1968-06-18
•
Expires: 1987-03-27
Abstract
No abstract record available.
Inventors
- 👤 Hjalsten John Anders
- 👤 Gustafsson Gunnar Arne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:06
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/005; E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/042; E21B17/0426; F; F16; F16B; F16B33/00; F16B33/02; B23B2260/00; B23B2260/138; B25; B25D; B25D2217/00; B25D2217/003; B25D2217/0034
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-18 | 1971-12-18 | 1972-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-18 | 1975-12-18 | 1976-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-18 | 1979-12-18 | 1980-06-18 | $7700.00 | Window Closed / Lapsed |