Patent US2468530A successfully refreshed from Google Patents.
US2468530A
Expired / Lapsed
US
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Aftertreatment of viscose rayon
Assignee: Akzona Inc
•
Filing: 1946-04-01
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Granted: 1949-04-26
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Expires: 1966-04-01
Abstract
No abstract record available.
Inventors
- 👤 Johannes G Weeldenburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:21
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/41
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1734516A
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US2054444A
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US2158494A
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US2088227A
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GB463472A
Cited
GB484691A
Cited
US2190672A
Cited
GB480171A
Cited
GB524511A
Cited
US2288695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-04-25 | 1952-10-25 | 1953-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-04-25 | 1956-10-25 | 1957-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-04-25 | 1960-10-25 | 1961-04-26 | $7700.00 | Window Closed / Lapsed |