Patent US2991614A successfully refreshed from Google Patents.
US2991614A
Expired / Lapsed
US
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False twisting apparatus for producing crimped filamentary materials
Assignee: Individual
•
Filing: 1954-03-24
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Granted: 1961-07-11
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Expires: 1974-03-24
Abstract
No abstract record available.
Inventors
- 👤 Ubbelohde Leo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:48
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/02; D02G1/04; D02G1/08; D02G1/085; D02G1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2098974A
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US2111209A
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US2107004A
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US2244832A
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US2262589A
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US2557104A
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US2463618A
Cited
US2475922A
Cited
US2590374A
Cited
US2620517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |