US2398491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boring head
Assignee: Individual
•
Filing: 1942-12-18
•
Granted: 1946-04-16
•
Expires: 1962-12-18
Abstract
No abstract record available.
Inventors
- 👤 Bell Nicholas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:06
CPC Classifications
B; B23; B23B; B23B29/00; B23B29/03; B23B29/034; B23B29/03403; B23B29/03407; Y; Y10; Y10T; Y10T407/00; Y10T407/22; Y10T407/2214; Y10T407/2216; Y10T407/222; Y10T408/00; Y10T408/83; Y10T408/85; Y10T408/858; Y10T408/8598; Y10T408/94; Y10T408/95
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) | 1949-04-15 | 1949-10-15 | 1950-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-04-15 | 1953-10-15 | 1954-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-04-15 | 1957-10-15 | 1958-04-16 | $7700.00 | Window Closed / Lapsed |