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US2454437A
Expired / Lapsed
US
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Device for working thermoplastic materials
Assignee: Individual
•
Filing: 1946-07-03
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Granted: 1948-11-23
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Expires: 1966-07-03
Abstract
No abstract record available.
Inventors
- 👤 Ehnborn Victor Clemens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:29
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/02; B29C53/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2111392A
Cited
US2382807A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-23 | 1952-05-24 | 1952-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-23 | 1956-05-24 | 1956-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-23 | 1960-05-24 | 1960-11-23 | $7700.00 | Window Closed / Lapsed |