Patent CA597577A successfully refreshed from Google Patents.
Patent US3009765A successfully refreshed from Google Patents.
US3009765A
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Method of making polyurethane filamentary material
Assignee: Uniroyal Inc
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Filing: 1959-02-20
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Granted: 1961-11-21
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Expires: 1979-02-20
Abstract
No abstract record available.
Inventors
- 👤 David G Slovin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:54
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; D; D01; D01F; D01F6/00; D01F6/58; D01F6/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A METHOD OF MAKING A FILAMENTARY MATERIAL COMPRISING IN COMBINATION THE STEPS OF PROVIDING A LIQUID POLYURETHANE PREPOLYMER WHICH IS A REACTION PRODUCT OF A POLYMER HAVING TERMINAL HYDROXYL GROUPS SELECTED FROM THE GROUP CONSISTING OF POLYESTERS AND POLYETHERS WITH AN EXCESS OF AN AROMATIC DIISOCYANATE, EXTRUDING A STREAM OF SAID LIQUID PREPOLYMER INTO AN AQUEOUS ALIPHATIC DIPRIMARY DIAMINE BATH TO EFFECT AN INITIAL SETTING OF THE EXTRUDED MATERIAL, WASHING THE EXTRUDED MATERIAL WITH ACID TO REMOVE SAID DIAMINE FROM THE SURFACE THEREOF, AND THEREAFTER CURING THE EXTRUDED MATERIAL BY THE ACTION OF WATER.
Claim 2
Independent Claim
94 words
A METHOD OF MAKING A FILAMENTARY MATERIAL COMPRISING IN COMBINATION THE STEPS OF PROVIDING A LIQUID POLYURETHANE PREPOLYMER WHICH IS A REACTION PRODUCT OF A POLYMER HAVING TERMINAL HYDROXYL GROUPS SELECTED FROM THE GROUP CONSISTING OF POLYESTERS AND POLYETHERS WITH AN EXCESS OF AN AROMATIC DIISOCYANATE, EXTRUDING A STREAM OF SAID LIQUID PREPOLYMER INTO AN AQUEOUS ALIPHATIC DIPRIMARY DIAMINE BATH TO EFFECT AN INITIAL SETTING OF THE EXTRUDED MATERIAL, WASHING THE EXTRUDED MATERIAL WITH ACID TO REMOVE SAID DIAMINE FROM THE SURFACE THEREOF, AND THEREAFTER CURING THE EXTRUDED MATERIAL BY THE ACTION OF WATER.
References Cited (Backward Citations)
US2650212A
Cited
US2657151A
Cited
US2755266A
Cited
US2708617A
Cited
US2813775A
Cited
US2850467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-20 | 1965-05-22 | 1965-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-20 | 1969-05-22 | 1969-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-20 | 1973-05-22 | 1973-11-21 | $7700.00 | Window Closed / Lapsed |