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Patent US2479218A successfully refreshed from Google Patents.
US2479218A
Expired / Lapsed
US
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Process for making rayon filaments
Assignee: International Paper Canada Inc
•
Filing: 1944-12-12
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Granted: 1949-08-16
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Expires: 1964-12-12
Abstract
No abstract record available.
Inventors
- 👤 Rene E Dosne
- 👤 Charles Frank Roland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:25
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/06; Y; Y10; Y10S; Y10S264/00; Y10S264/27
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1626454A
Cited
GB298548A
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US1831030A
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GB324963A
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GB362460A
Cited
US2064915A
Cited
US2192074A
Cited
US2340377A
Cited
US2312152A
Cited
US2324437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-15 | 1953-02-14 | 1953-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-15 | 1957-02-14 | 1957-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-15 | 1961-02-14 | 1961-08-16 | $7700.00 | Window Closed / Lapsed |