Patent US2442444A successfully refreshed from Google Patents.
US2442444A
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Boring head
Assignee: Individual
•
Filing: 1945-09-10
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Granted: 1948-06-01
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Expires: 1965-09-10
Abstract
No abstract record available.
Inventors
- 👤 Herbert E Tautz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:17
CPC Classifications
B; B23; B23B; B23B29/00; B23B29/03; B23B29/034; B23B29/03403; B23B29/03407; B23B29/03414; B23B31/00; B23B31/02; B23B31/10; B23B31/12; B23B31/20; B23B31/201; B23B31/2012; B23B31/20125; B23B31/202; B23B31/36; B23B2260/00; B23B2260/088; Y; Y10; Y10T; Y10T279/00; Y10T279/14; Y10T408/00; Y10T408/94
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-01 | 1951-12-01 | 1952-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-01 | 1955-12-01 | 1956-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-01 | 1959-12-01 | 1960-06-01 | $7700.00 | Window Closed / Lapsed |