Patent US2780346A successfully refreshed from Google Patents.
US2780346A
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Treatment of filaments
Assignee: Celanese Corp
•
Filing: 1953-04-15
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Granted: 1957-02-05
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Expires: 1973-04-15
Abstract
No abstract record available.
Inventors
- 👤 Robert H Roughsedge
- 👤 Taylor David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:57
CPC Classifications
D; D01; D01D; D01D10/00; D01D10/04; D01D10/0436; D01D10/0463
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US180393A
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US250959A
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US441205A
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US644498A
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US1561953A
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US1820621A
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GB357597A
Cited
FR847737A
Cited
US2392268A
Cited
US2525760A
Cited
US2658255A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |