US3537738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill rod for long hole drilling in the ground
Assignee: Sandvik AB
•
Filing: 1968-04-15
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Granted: 1970-11-03
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Expires: 1988-04-15
Abstract
No abstract record available.
Inventors
- 👤 Hans Christian Peder Fischer
- 👤 John Anders Hjalsten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:51
CPC Classifications
F; F16; F16B; F16B7/00; F16B7/18; F16B7/182; E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/042; E21B17/0426
Claims Analysis
Total Claims: 0
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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) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |