Patent US2551331A successfully refreshed from Google Patents.
US2551331A
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US
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Machine tool for milling tubular workpieces
Assignee: Layne and Bowler Inc
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Filing: 1949-11-05
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Granted: 1951-05-01
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Expires: 1969-11-05
Abstract
No abstract record available.
Inventors
- 👤 Bert V Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:25
CPC Classifications
B; B23; B23B; B23B5/00; B23B5/16; B23B5/165; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/518; Y10T408/00; Y10T408/36; Y10T408/375; Y10T408/378; Y10T409/00; Y10T409/30; Y10T409/300056; Y10T409/300392; Y10T409/300504; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T82/00; Y10T82/25; Y10T82/2552
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) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |