Patent US2447055A successfully refreshed from Google Patents.
US2447055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of expanded plastic materials
Assignee: Expanded Rubber Co Ltd
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Filing: 1944-10-10
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Granted: 1948-08-17
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Expires: 1964-10-10
Abstract
No abstract record available.
Inventors
- 👤 Cooper Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:27
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2132969A
Cited
GB502759A
Cited
GB500298A
Cited
US2183857A
Cited
US2283316A
Cited
US2371868A
Cited
US2386995A
Cited
US2376653A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-17 | 1952-02-16 | 1952-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-17 | 1956-02-16 | 1956-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-17 | 1960-02-16 | 1960-08-17 | $7700.00 | Window Closed / Lapsed |