US2956337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of boring metals
Assignee: Cefilac SA
•
Filing: 1956-06-21
•
Granted: 1960-10-18
•
Expires: 1976-06-21
Abstract
No abstract record available.
Inventors
- 👤 Buffet Jean
- 👤 Meriaux Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:00
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/32; B21J; B21J5/00; B21J5/06; B21J5/10; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981; Y10T29/49812
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2628516A
Cited
US2756494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |