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Patent US2147709A successfully refreshed from Google Patents.
US2147709A
Expired / Lapsed
US
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Tinned copper radiator fin
Assignee: Motors Liquidation Co
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Filing: 1937-06-11
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Granted: 1939-02-21
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Expires: 1957-06-11
Abstract
No abstract record available.
Inventors
- 👤 Ledra M Lawton
- 👤 Leroy W Shutts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:41
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/22; B21C37/24; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/941; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49366; Y10T29/49377; Y10T29/49378; Y10T29/4938; Y10T428/00; Y10T428/12; Y10T428/12347; Y10T428/12493; Y10T428/12708; Y10T428/12715
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) | 1942-02-20 | 1942-08-22 | 1943-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-02-20 | 1946-08-22 | 1947-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-02-20 | 1950-08-22 | 1951-02-21 | $7700.00 | Window Closed / Lapsed |