Patent US2412937A successfully refreshed from Google Patents.
US2412937A
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Boring head
Assignee: NORMAN Co VAN
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Filing: 1944-06-30
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Granted: 1946-12-24
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Expires: 1964-06-30
Abstract
No abstract record available.
Inventors
- 👤 Edward A Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:41
CPC Classifications
B; B23; B23B; B23B29/00; B23B29/03; B23B29/034; B23B29/03403; B23B29/03407; B23Q; B23Q1/00; B23Q1/0009; B23Q1/0018; B23Q1/0027; B23Q1/0036; Y; Y10; Y10T; Y10T408/00; Y10T408/44; Y10T408/45; Y10T408/453; Y10T408/83; Y10T408/85; Y10T408/858; Y10T408/8598; Y10T408/89; Y10T408/892
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) | 1949-12-23 | 1950-06-24 | 1950-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-12-23 | 1954-06-24 | 1954-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-12-23 | 1958-06-24 | 1958-12-24 | $7700.00 | Window Closed / Lapsed |