US2468530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aftertreatment of viscose rayon
Assignee: Akzona Inc
•
Filing: 1946-04-01
•
Granted: 1949-04-26
•
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 07:31
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/41
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1734516A
Cited
US2054444A
Cited
US2158494A
Cited
US2088227A
Cited
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 |