Patent US2428309A successfully refreshed from Google Patents.
US2428309A
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Boring machine
Assignee: Giddings and Lewis LLC
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Filing: 1945-03-15
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Granted: 1947-09-30
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Expires: 1965-03-15
Abstract
No abstract record available.
Inventors
- 👤 Keith F Gallimore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:41
CPC Classifications
B; B23; B23Q; B23Q5/00; B23Q5/22; B23Q5/225; Y; Y10; Y10T; Y10T408/00; Y10T408/10; Y10T408/55; Y10T408/561; Y10T408/5612
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) | 1950-09-29 | 1951-03-31 | 1951-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-29 | 1955-03-31 | 1955-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-29 | 1959-03-31 | 1959-09-30 | $7700.00 | Window Closed / Lapsed |