US1884203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and machine for making spiral fin tubing
Assignee: McCord Radiator and Manufacturing Co
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Filing: 1928-04-02
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Granted: 1932-10-25
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Expires: 1948-04-02
Abstract
No abstract record available.
Inventors
- 👤 George H Pickhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:16
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/22; B21C37/26; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378; Y10T29/49382; Y10T29/51; Y10T29/5188
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) | 1935-10-25 | 1936-04-25 | 1936-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-10-25 | 1940-04-25 | 1940-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-10-25 | 1944-04-25 | 1944-10-25 | $7700.00 | Window Closed / Lapsed |