Patent US2042379A successfully refreshed from Google Patents.
US2042379A
Expired / Lapsed
US
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Metalworking apparatus
Assignee: WF and John Barnes Co
•
Filing: 1931-02-14
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Granted: 1936-05-26
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Expires: 1951-02-14
Abstract
No abstract record available.
Inventors
- 👤 John S Barnes
- 👤 Paul R Guirl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:39
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/001; B23Q11/0028; Y; Y10; Y10T; Y10T408/00; Y10T408/16; Y10T408/17; Y10T408/172; Y10T408/173; Y10T408/175; Y10T408/36; Y10T408/38
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) | 1939-05-26 | 1939-11-25 | 1940-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-05-26 | 1943-11-25 | 1944-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-05-26 | 1947-11-25 | 1948-05-26 | $7700.00 | Window Closed / Lapsed |