US2458753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boring head
Assignee: Individual
•
Filing: 1944-06-26
•
Granted: 1949-01-11
•
Expires: 1964-06-26
Abstract
No abstract record available.
Inventors
- 👤 Frank C Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:04
CPC Classifications
B; B23; B23B; B23B29/00; B23B29/03; B23B29/034; B23B29/03432; B23B29/03457; Y; Y10; Y10T; Y10T408/00; Y10T408/83; Y10T408/85; Y10T408/858; Y10T408/8595
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE356083C
Cited
GB190928967A
Cited
CH84483A
Cited
US1980178A
Cited
US2333233A
Cited
US2369875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-11 | 1952-07-12 | 1953-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-11 | 1956-07-12 | 1957-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-11 | 1960-07-12 | 1961-01-11 | $7700.00 | Window Closed / Lapsed |