Patent US2557760A successfully refreshed from Google Patents.
US2557760A
Expired / Lapsed
US
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Radiator
Assignee: C A DUNHAM Co
•
Filing: 1947-09-16
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Granted: 1951-06-19
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Expires: 1967-09-16
Abstract
No abstract record available.
Inventors
- 👤 Ellis G Powell
- 👤 Oscar G Johnson
- 👤 Albert J Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:07
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/04; F28D1/053
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190323227A
Cited
GB190503026A
Cited
US1634110A
Cited
US1916656A
Cited
US1960955A
Cited
US1992646A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |