US3021745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wedge device for anchoring bolts in holes
Assignee: KEREL AB
•
Filing: 1958-06-03
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Granted: 1962-02-20
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Expires: 1978-06-03
Abstract
No abstract record available.
Inventors
- 👤 Libom Karl Helmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:27
CPC Classifications
E; E21; E21D; E21D21/00; E21D21/008; F; F16; F16B; F16B13/00; F16B13/04; F16B13/08; F16B13/0891
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) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |