US2457808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent red cellulose acetate fibers
Assignee: Celanese Corp
•
Filing: 1945-03-14
•
Granted: 1949-01-04
•
Expires: 1965-03-14
Abstract
No abstract record available.
Inventors
- 👤 Robert G Dort
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:41
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/22; D; D01; D01F; D01F1/00; D01F1/02; D01F1/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB275553A
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US1791199A
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US1885591A
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GB348094A
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US1956948A
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US2128338A
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US2152856A
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US2160839A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-04 | 1952-07-05 | 1953-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-04 | 1956-07-05 | 1957-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-04 | 1960-07-05 | 1961-01-04 | $7700.00 | Window Closed / Lapsed |