Patent US3257545A successfully refreshed from Google Patents.
US3386967A
Expired / Lapsed
US
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Polycaproamide having excess number of carboxyl end groups over amino end groups
Assignee: Honeywell International Inc
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Filing: 1965-01-19
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Granted: 1968-06-04
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Expires: 1985-01-19
Abstract
No abstract record available.
Inventors
- 👤 Ian C Twilley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:09
CPC Classifications
C; C08; C08L; C08L77/00; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/16; D; D01; D01F; D01F1/00; D01F1/02; D01F1/10; D01F6/00; D01F6/58; D01F6/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A LINEAR FIBER-FORMING E-POLYCAPROAMIDE WHEREIN THE END GROUPS ARE SUBSTANTIALLY ALL PRIMARY AMINO GROUPS AND CARBOXYL GROUPS; WHEREIN THE TOTAL END GROUPS ANALYZE BETWEEN ABOUT 50 AND ABOUT 80 MILIEQUIVALENTS PER KILOGRAM OF POLYCAPROAMIDE; THE PRIMARY AMINO GROUPS ANALYZE NOT ABOVE ABOUT 10 MILLIEQUIVALENTS PER KILOGRAM OF POLYCAPROAMIDE; AND THE MELT VISCOSITY IN BRABENDER UNITS AT 265*C. IS NOT ABOVE ABOUT 500.
Claim 2
Dependent Claim
62 words
A LINEAR FIBER-FORMING E-POLYCAPROAMIDE WHEREIN THE END GROUPS ARE SUBSTANTIALLY ALL PRIMARY AMINO GROUPS AND CARBOXYL GROUPS; WHEREIN THE TOTAL END GROUPS ANALYZE BETWEEN ABOUT 50 AND ABOUT 80 MILIEQUIVALENTS PER KILOGRAM OF POLYCAPROAMIDE; THE PRIMARY AMINO GROUPS ANALYZE NOT ABOVE ABOUT 10 MILLIEQUIVALENTS PER KILOGRAM OF POLYCAPROAMIDE; AND THE MELT VISCOSITY IN BRABENDER UNITS AT 265*C. IS NOT ABOVE ABOUT 500.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |