Patent US2646972A successfully refreshed from Google Patents.
US2646972A
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US
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Fin type radiator
Assignee: Knapp Monarch Co
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Filing: 1950-02-04
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Granted: 1953-07-28
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Expires: 1970-02-04
Abstract
No abstract record available.
Inventors
- 👤 Edward C Schmid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:39
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/03; F28D1/0391; F28D1/0308; H; H05; H05B; H05B3/00; H05B3/40; H05B3/42; H05B3/48; H05B3/50; F28D21/00; F28D2021/0019; F28D2021/0035; Y; Y02; Y02B; Y02B30/00
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) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |