US2968857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High bulk filamentary material and methods of producing the same
Assignee: Celanese Corp
•
Filing: 1957-07-30
•
Granted: 1961-01-24
•
Expires: 1977-07-30
Abstract
No abstract record available.
Inventors
- 👤 Swerdloff Jack
- 👤 Ezra B Larsen
- 👤 Adriaan J Troeleman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:04
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/12; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2326174A
Cited
US2575781A
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US2715309A
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US2647285A
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US2865080A
Cited
US2750653A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-24 | 1964-07-25 | 1965-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-24 | 1968-07-25 | 1969-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-24 | 1972-07-25 | 1973-01-24 | $7700.00 | Window Closed / Lapsed |