Patent US2381806A successfully refreshed from Google Patents.
US2381806A
Expired / Lapsed
US
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Metal boring tool
Assignee: Individual
•
Filing: 1943-12-02
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Granted: 1945-08-07
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Expires: 1963-12-02
Abstract
No abstract record available.
Inventors
- 👤 Milton A Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:22
CPC Classifications
B; B23; B23B; B23B29/00; B23B29/03; B23B29/034; B23B29/03403; B23B29/03428; Y; Y10; Y10T; Y10T279/00; Y10T279/14; Y10T407/00; Y10T407/19; Y10T407/1906; Y10T407/1928; Y10T407/193; Y10T407/1952; Y10T407/1956; Y10T408/00; Y10T408/86; Y10T408/865; Y10T408/868
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) | 1948-08-06 | 1949-02-05 | 1949-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-08-06 | 1953-02-05 | 1953-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-08-06 | 1957-02-05 | 1957-08-07 | $7700.00 | Window Closed / Lapsed |