Patent US2379870A successfully refreshed from Google Patents.
US2379870A
Expired / Lapsed
US
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Machine for machining arcuate surfaces
Assignee: Individual
•
Filing: 1942-11-05
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Granted: 1945-07-10
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Expires: 1962-11-05
Abstract
No abstract record available.
Inventors
- 👤 Barker Edgar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:28
CPC Classifications
B; B23; B23C; B23C3/00; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/304536; Y10T409/304648; Y10T409/30476; Y10T409/304872; Y10T409/304928; Y10T409/305096; Y10T409/305488; Y10T409/30784; Y10T409/307952; Y10T409/308344; Y10T82/00; Y10T82/25; Y10T82/2572; Y10T82/2574
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) | 1948-07-09 | 1949-01-08 | 1949-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-07-09 | 1953-01-08 | 1953-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-07-09 | 1957-01-08 | 1957-07-10 | $7700.00 | Window Closed / Lapsed |