US3395970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of carbonizing polyacrylonitrile impregnated cellulose, cyanoethylated cellulose and acrylonitrile graft copolymerized cellulose textiles
Assignee: Deering Milliken Research Corp
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Filing: 1963-10-30
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Granted: 1968-08-06
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Expires: 1983-10-30
Abstract
No abstract record available.
Inventors
- 👤 Machell Greville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:50
CPC Classifications
D; D01; D01F; D01F9/00; D01F9/08; D01F9/12; D01F9/14; D01F9/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A METHOD FOR THE PREPARATION OF LOW WEIGHT LOSS CARBONIZED TEXTILE MATERIALS COMPRISING TREATING A CELLULOSE TEXTILE MATERIAL WITH ACRYLONITRILE SO THAT SAID CELLULOSE TEXTILE MATERIAL WILL HAVE A PICKUP OF ABOUT AT LEAST 5% ACRYLONITRILE BASED ON THE WEIGHT OF THE INITIAL TEXTILE MATERIAL TO PRODUCE A DRY CELLULOSE TEXTILE MATERIAL SELECTED FROM THE GROUP CONSISTING OF CELLULOSE IMPREGNATED WITH POLYACRYLONITRILE, CYANOETHYLATED CELLULOSE AND CELLULOSE GRAFT COPOLYMERIZED WITH ACRYLONITRILE AND THEN CARBONIZING THE ACRYLONITRILE TREATED CELLULOSE TEXTILE MATERIAL BY HEATING SAID TEXTILE MATERIAL IN A SUBSTANTIALLY INERT ATMOSPHERE THAT DOES NOT SUPPORT COMBUSTION AT A TEMPERATURE IN THE RANGE OF ABOUT 300*C. TO ABOUT 3000*C.
Claim 2
Independent Claim
106 words
A METHOD FOR THE PREPARATION OF LOW WEIGHT LOSS CARBONIZED TEXTILE MATERIALS COMPRISING TREATING A CELLULOSE TEXTILE MATERIAL WITH ACRYLONITRILE SO THAT SAID CELLULOSE TEXTILE MATERIAL WILL HAVE A PICKUP OF ABOUT AT LEAST 5% ACRYLONITRILE BASED ON THE WEIGHT OF THE INITIAL TEXTILE MATERIAL TO PRODUCE A DRY CELLULOSE TEXTILE MATERIAL SELECTED FROM THE GROUP CONSISTING OF CELLULOSE IMPREGNATED WITH POLYACRYLONITRILE, CYANOETHYLATED CELLULOSE AND CELLULOSE GRAFT COPOLYMERIZED WITH ACRYLONITRILE AND THEN CARBONIZING THE ACRYLONITRILE TREATED CELLULOSE TEXTILE MATERIAL BY HEATING SAID TEXTILE MATERIAL IN A SUBSTANTIALLY INERT ATMOSPHERE THAT DOES NOT SUPPORT COMBUSTION AT A TEMPERATURE IN THE RANGE OF ABOUT 300*C. TO ABOUT 3000*C.
References Cited (Backward Citations)
US3233014A
Cited
US3053775A
Cited
US3174895A
Cited
US3107152A
Cited
US3179605A
Cited
US3242000A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-06 | 1972-02-05 | 1972-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-06 | 1976-02-05 | 1976-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-06 | 1980-02-05 | 1980-08-06 | $7700.00 | Window Closed / Lapsed |