US2461612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing of resins with polyhydroxy alcohol assistants
Assignee: Celanese Corp
•
Filing: 1945-04-05
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Granted: 1949-02-15
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Expires: 1965-04-05
Abstract
No abstract record available.
Inventors
- 👤 Olpin Henry Charles
- 👤 Wesson Alexander James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:55
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/90; D06P3/00; D06P3/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-15 | 1952-08-16 | 1953-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-15 | 1956-08-16 | 1957-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-15 | 1960-08-16 | 1961-02-15 | $7700.00 | Window Closed / Lapsed |