Patent US2471280A successfully refreshed from Google Patents.
US2471280A
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Assignee: National Fitch Corp
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Filing: 1946-02-12
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Granted: 1949-05-24
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Expires: 1966-02-12
Abstract
No abstract record available.
Inventors
- 👤 Ragnar A Norbom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:39
CPC Classifications
B; B60; B60P; B60P3/00; B60P3/22; B60P3/224; Y; Y10; Y10T; Y10T137/00; Y10T137/4673; Y10T137/479; Y10T137/6851; Y10T137/6855; Y10T137/8593; Y10T137/86187
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1463743A
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US2010540A
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US2325432A
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US2368396A
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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) | 1952-05-23 | 1952-11-22 | 1953-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-23 | 1956-11-22 | 1957-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-23 | 1960-11-22 | 1961-05-24 | $7700.00 | Window Closed / Lapsed |