US2905440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable feed electric drilling machines
Assignee: CONST ELECTRO MECANIQUES DE SA
•
Filing: 1953-04-03
•
Granted: 1959-09-22
•
Expires: 1973-04-03
Abstract
No abstract record available.
Inventors
- 👤 Gerentes Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:00
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/08; E21B19/081; E21B44/00; E21B44/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2023841A
Cited
US2258951A
Cited
US2434120A
Cited
US2389532A
Cited
US2615683A
Cited
US2547079A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |