Patent US2443336A successfully refreshed from Google Patents.
US2443336A
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US
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Electric hot forming apparatus
Assignee: HPM Development Corp
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Filing: 1944-11-22
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Granted: 1948-06-15
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Expires: 1964-11-22
Abstract
No abstract record available.
Inventors
- 👤 George A Waldie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:38
CPC Classifications
B; B21; B21D; B21D24/00; B21D24/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US486627A
Cited
US1112779A
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US1242580A
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US1252289A
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US1333036A
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US1658056A
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US2089030A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-15 | 1951-12-15 | 1952-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-15 | 1955-12-15 | 1956-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-15 | 1959-12-15 | 1960-06-15 | $7700.00 | Window Closed / Lapsed |