Patent US2439939A successfully refreshed from Google Patents.
US2439939A
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US
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System of forming sheet material
Assignee: Individual
•
Filing: 1945-07-03
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Granted: 1948-04-20
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Expires: 1965-07-03
Abstract
No abstract record available.
Inventors
- 👤 Lesavoy I Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:01
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/18; B29C65/24; B29C65/245; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/25; B29C48/88; B29C48/91; B29C48/911; B29C48/9135; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/80; B29C66/81; B29C66/814; B29C66/8141; B29C66/81431; B29C66/83; B29C66/834; B29C66/8341; B29C66/83411; B29C66/83413; B29C66/83415; B29C66/83417; B29C66/45; B29C66/81411; B29C66/81421; B29C66/81423
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1195408A
Cited
US1237634A
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US1297643A
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US1592975A
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US2070600A
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US2164058A
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US2179444A
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US2358176A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-20 | 1951-10-20 | 1952-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-20 | 1955-10-20 | 1956-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-20 | 1959-10-20 | 1960-04-20 | $7700.00 | Window Closed / Lapsed |