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US3445993A
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US
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Method of and apparatus for producing core yarns
Assignee: Vyzkumny Ustav Bavlnarsky AS
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Filing: 1967-01-19
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Granted: 1969-05-27
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Expires: 1987-01-19
Abstract
No abstract record available.
Inventors
- 👤 Premysl Vorisek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:36
CPC Classifications
D; D01; D01H; D01H4/00; D01H4/04; D01H4/08; D02; D02G; D02G3/00; D02G3/22; D02G3/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3126697A
Cited
US2202118A
Cited
DE747345C
Cited
US2451881A
Cited
US3091909A
Cited
US3217482A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |