Patent US1421221A successfully refreshed from Google Patents.
US1421221A
Expired / Lapsed
US
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Radiator for explosion engines
Assignee: Individual
•
Filing: 1919-12-13
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Granted: 1922-06-27
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Expires: 1939-12-13
Abstract
No abstract record available.
Inventors
- 👤 Harter Emile
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:44
CPC Classifications
F; F28; F28D; F28D11/00; F28D11/02; F28D11/025; Y; Y10; Y10S; Y10S165/00; Y10S165/228; Y10S165/302; Y10S165/303
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1925-06-26 | 1925-12-26 | 1926-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-06-26 | 1929-12-26 | 1930-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-06-26 | 1933-12-26 | 1934-06-27 | $7700.00 | Window Closed / Lapsed |