US2487833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of saponifying yarn cakes
Assignee: Celanese Corp
•
Filing: 1945-05-19
•
Granted: 1949-11-15
•
Expires: 1965-05-19
Abstract
No abstract record available.
Inventors
- 👤 George W Seymour
- 👤 William J Elvin
- 👤 Dustin Y Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:03
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/32; D06M11/36; D06M11/38; D06M11/385
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE155240C
Cited
US1825974A
Cited
US1799103A
Cited
US2049430A
Cited
US2092124A
Cited
US2092125A
Cited
US2092126A
Cited
US2250085A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-14 | 1953-05-16 | 1953-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-14 | 1957-05-16 | 1957-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-14 | 1961-05-16 | 1961-11-15 | $7700.00 | Window Closed / Lapsed |