US3308221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Melt spinning of modified cross section yarn
Assignee: Honeywell International Inc
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Filing: 1965-10-21
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Granted: 1967-03-07
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Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 James E Opfell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:40
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/253
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PROCESS FOR THE PRODUCTION OF POLYCAPROAMIDE YARN COMPRISING EXTRUDING DOWNWARD AT CONSTANT TEMPERATURE BETWEEN ABOUT 250*C. AND ABOUT 285*C. E-POLYCAPROAMIDE HAVING CONSTANT FORMIC ACID RELATIVE VISCOSITY BETWEEN ABOUT 30 AND ABOUT 75 $2 UNIT, CONTAINING NOT OVER ABOUT 2% OF MONOMER AND NOT OVER 0.2% MOISTURE THROUGH A PLURALITY OF SPINNERETTE ORIFICES, EACH ORIFICE CONSISTING OF AN INLET PASSAGE LEADING TO A GROUP OF THREE CIRCULAR HOLES, SAID THREE HOLES ARRANGED WITH THEIR CENTERS FORMING AN ISOCELES TRIANGLE HAVING APEX ANGLE IN THE RANGE OF ABOUT 80* TO ABOUT 120*, THE SEPARATION BETWEEN PERIPHERIES OF THE NEAREST ADJOIN-
Claim 2
Dependent Claim
99 words
A PROCESS FOR THE PRODUCTION OF POLYCAPROAMIDE YARN COMPRISING EXTRUDING DOWNWARD AT CONSTANT TEMPERATURE BETWEEN ABOUT 250*C. AND ABOUT 285*C. E-POLYCAPROAMIDE HAVING CONSTANT FORMIC ACID RELATIVE VISCOSITY BETWEEN ABOUT 30 AND ABOUT 75 $2 UNIT, CONTAINING NOT OVER ABOUT 2% OF MONOMER AND NOT OVER 0.2% MOISTURE THROUGH A PLURALITY OF SPINNERETTE ORIFICES, EACH ORIFICE CONSISTING OF AN INLET PASSAGE LEADING TO A GROUP OF THREE CIRCULAR HOLES, SAID THREE HOLES ARRANGED WITH THEIR CENTERS FORMING AN ISOCELES TRIANGLE HAVING APEX ANGLE IN THE RANGE OF ABOUT 80* TO ABOUT 120*, THE SEPARATION BETWEEN PERIPHERIES OF THE NEAREST ADJOIN-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |