US3551949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spinning chimney
Assignee: Monsanto Co
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Filing: 1968-11-15
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Granted: 1971-01-05
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Expires: 1988-11-15
Abstract
Abstract A SPINNING CHIMNEY TO BE USED FOR THE QUENCHING OF MOLTEN POLYMERIC FILAMENTS, SAID CHIMNEY HAVING SIDES AND A BACK WITH THE SIDE COMPRISING CONVERGING WALLS WHICH CONFORM TO THE PATH OF FILAMENTS FROM THE SPINNERET TO THE CONVERGENCE GUIDE AND DIVERGING WINGS WHICH COMMUNICATE WITH THE LEADING EDGES OF THE WALLS, AND A PLENUM CHAMBER ASSOCIATED WITH THE UPPER PORTION OF THE BACK OF THE CHIMNEY FOR DIRECTING THE FLOW OF AIR OVER THE FILAMENTS.
Inventors
- 👤 Allen E Leybourne
- 👤 John R Dees
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:19
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/08; D01D5/088; D01D5/092
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |