Patent US2224386A successfully refreshed from Google Patents.
US2224386A
Expired / Lapsed
US
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Rotary tool for boring and like operations
Assignee: Heald Machine Co
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Filing: 1937-11-17
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Granted: 1940-12-10
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Expires: 1957-11-17
Abstract
No abstract record available.
Inventors
- 👤 Waldo J Guild
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:43
CPC Classifications
B; B23; B23B; B23B29/00; B23B29/03; B23B29/034; B23B29/03432; B23B2270/00; B23B2270/04; Y; Y10; Y10S; Y10S408/00; Y10S408/714; Y10T; Y10T408/00; Y10T408/89; Y10T82/00; Y10T82/12; Y10T82/125
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) | 1943-12-10 | 1944-06-10 | 1944-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-12-10 | 1948-06-10 | 1948-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-12-10 | 1952-06-10 | 1952-12-10 | $7700.00 | Window Closed / Lapsed |