Patent US1983549A successfully refreshed from Google Patents.
US1983549A
Expired / Lapsed
US
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Radiator fin
Assignee: REFRIGERATION APPLIANCES Inc
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Filing: 1933-05-10
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Granted: 1934-12-11
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Expires: 1953-05-10
Abstract
No abstract record available.
Inventors
- 👤 Hermann J Krackowizer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:15
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/04; F28D1/053; Y; Y10; Y10S; Y10S165/00; Y10S165/454; Y10S165/50; Y10S165/501; Y10S165/502; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378; Y10T29/4938
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) | 1937-12-10 | 1938-06-11 | 1938-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-12-10 | 1942-06-11 | 1942-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-12-10 | 1946-06-11 | 1946-12-11 | $7700.00 | Window Closed / Lapsed |