Patent US2454794A successfully refreshed from Google Patents.
US2454794A
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Assignee: Individual
•
Filing: 1945-07-31
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Granted: 1948-11-30
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Expires: 1965-07-31
Abstract
No abstract record available.
Inventors
- 👤 Hakanson Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:22
CPC Classifications
F; F16; F16G; F16G13/00; F16G13/18; F16G13/20; E; E05; E05C; E05C17/00; E05C17/02; E05C17/04; E05C17/36; Y; Y10; Y10T; Y10T24/00; Y10T24/39; Y10T24/3902; Y10T292/00; Y10T292/28; Y10T292/283; Y10T292/285; Y10T292/288
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US482227A
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US1319396A
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GB323421A
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GB321230A
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US2048131A
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US2080656A
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US2131261A
Cited
US2185161A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-30 | 1952-05-31 | 1952-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-30 | 1956-05-31 | 1956-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-30 | 1960-05-31 | 1960-11-30 | $7700.00 | Window Closed / Lapsed |