US1993642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making bore holes
Assignee: NAAMLOOZE VENNOOTSCHAP SMELTBO
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Filing: 1933-03-15
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Granted: 1935-03-05
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Expires: 1953-03-15
Abstract
No abstract record available.
Inventors
- 👤 Aarts Christianus J Godefridus
- 👤 Mekel Johannes Anton Alphonsus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:59
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1938-03-04 | 1938-09-03 | 1939-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-03-04 | 1942-09-03 | 1943-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-03-04 | 1946-09-03 | 1947-03-05 | $7700.00 | Window Closed / Lapsed |