Patent US2869975A successfully refreshed from Google Patents.
US2869975A
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Process for shrinking and setting polyacrylonitrile textile filaments with specific chemical shrinking agents
Assignee: EIDP Inc
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Filing: 1955-03-28
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Granted: 1959-01-20
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Expires: 1975-03-28
Abstract
No abstract record available.
Inventors
- 👤 Hare Weston Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:49
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/224; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PROCESS FOR SHRINKING AND SETTING FILAMENTARY TEXTILE MATERIAL INHERENTLY CAPABLE THEREOF MADE FROM A POLYMER OBTAINED BY POLYMERIZING AT LEAST 85% ACRYLONITRILE AND UP TO 15% OF ETHYLENICALLY UNSATURATED MONOMER COPOLYMERIZABLE WITH THE ACRYLONITIRILE CONTACTING THE SAID TEXTILE MATERIAL WITHOUT DISSOLVING IT WITH AN AQUEOUS SOLUTION AT A TEMPERATURE OF FROM ABOUT 75*C. TO ITS BOILING POINT AT ATMOSPHERIC PRESSURE FOR AT LEAST ONE SECOND UNTIL SHRINKAGE TAKES PLACE, SAID AQUEOUS SOLUTION CONTAINING FROM ABOUT 10% TO ABOUT 40% OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ETHYLENE CARBONATE, PROPYLENE CARBONATE, TRI-METHYLENE CARBONATE, NITROMETHANE, DELTA-VALEROLACTONE AND GAMMABUTYROLACTONE.
Claim 2
Dependent Claim
99 words
A PROCESS FOR SHRINKING AND SETTING FILAMENTARY TEXTILE MATERIAL INHERENTLY CAPABLE THEREOF MADE FROM A POLYMER OBTAINED BY POLYMERIZING AT LEAST 85% ACRYLONITRILE AND UP TO 15% OF ETHYLENICALLY UNSATURATED MONOMER COPOLYMERIZABLE WITH THE ACRYLONITIRILE CONTACTING THE SAID TEXTILE MATERIAL WITHOUT DISSOLVING IT WITH AN AQUEOUS SOLUTION AT A TEMPERATURE OF FROM ABOUT 75*C. TO ITS BOILING POINT AT ATMOSPHERIC PRESSURE FOR AT LEAST ONE SECOND UNTIL SHRINKAGE TAKES PLACE, SAID AQUEOUS SOLUTION CONTAINING FROM ABOUT 10% TO ABOUT 40% OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ETHYLENE CARBONATE, PROPYLENE CARBONATE, TRI-METHYLENE CARBONATE, NITROMETHANE, DELTA-VALEROLACTONE AND GAMMABUTYROLACTONE.
References Cited (Backward Citations)
US2217113A
Cited
US2249756A
Cited
GB544821A
Cited
FR883764A
Cited
FR896083A
Cited
US2716586A
Cited
US2730479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |