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Patent US2448751A successfully refreshed from Google Patents.
US2448751A
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Assignee: VOLKEL BROS MACHINE WORKS
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Filing: 1946-08-10
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Granted: 1948-09-07
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Expires: 1966-08-10
Abstract
No abstract record available.
Inventors
- 👤 Frank G Volkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:49
CPC Classifications
B; B24; B24B; B24B41/00; B24B41/06; B24B41/061; Y; Y10; Y10S; Y10S29/00; Y10S29/086; Y10S29/104; Y10T; Y10T82/00; Y10T82/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US749766A
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US790705A
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US1029642A
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US1118072A
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US1535452A
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US1885848A
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US1912956A
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US2382896A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-07 | 1952-03-08 | 1952-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-07 | 1956-03-08 | 1956-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-07 | 1960-03-08 | 1960-09-07 | $7700.00 | Window Closed / Lapsed |