Patent US3232823A successfully refreshed from Google Patents.
US3232823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of converting hydrophilic cellulose graft copolymers to hydrophobic copolymers
Assignee: Rayonier Inc
•
Filing: 1962-05-02
•
Granted: 1966-02-01
•
Expires: 1982-05-02
Abstract
No abstract record available.
Inventors
- 👤 Sobolev Igor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:06
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/12; D21H5/14; D21H5/141; D21H5/143; C; C08; C08F; C08F251/00; C08F251/02; D21H11/00; D21H11/02; D21H11/06; D21H11/16; D21H11/20; Y; Y10; Y10S; Y10S8/00; Y10S8/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
39 words
THE PROCESS OF PRODUCING HYDROPHOBIC CELLULOSE METHYL METHACRYLATE GRAFT COPOLYMERS WHICH COMPRISES HEATING A HYDROPHILIC CELLULOSE METHYL METHACRYLATE GRAFT COPOLYMER CONTAINING FROM 1 TO 30 PERCENT METHYL METHACRYLATE POLYMER TO A TEMPERATURE ABOVE 105*C. FOR 10 TO 180 MINUTES.
Claim 2
Dependent Claim
39 words
THE PROCESS OF PRODUCING HYDROPHOBIC CELLULOSE METHYL METHACRYLATE GRAFT COPOLYMERS WHICH COMPRISES HEATING A HYDROPHILIC CELLULOSE METHYL METHACRYLATE GRAFT COPOLYMER CONTAINING FROM 1 TO 30 PERCENT METHYL METHACRYLATE POLYMER TO A TEMPERATURE ABOVE 105*C. FOR 10 TO 180 MINUTES.
Claim 3
Dependent Claim
69 words
THE PROCESS FOR IMPROVING THE PROPERTIES OF CELLULOSIC FIBERS WHICH COMPRISES GRAFTING ON THE CELLULOSE OF THE FIBERS A METHYL METHACRYLATE POLYMER FORMING HYDROPHILIC CELLULOSE METHYL METHACRYLATE GRAFT COPOLYMER, FORMING THE GRAFTED FIBERS INTO A SHEET, DRYING THE SHEET, AND WETTING THE CELLULOSE METHYL METHACRYLATE GRAFT COPOLYMER WITH A SOLVENT OF THE GROUP CONSISTING OF ACETONE, BENZENE, CHLOROFORM AND CARBON TETRACHLORIDE TO FORM HYDROPHOBIC CELLULOSE METHYL METHACRYLATE GRAFT COPOLYMER.
Claim 4
Dependent Claim
69 words
THE PROCESS FOR IMPROVING THE PROPERTIES OF CELLULOSIC FIBERS WHICH COMPRISES GRAFTING ON THE CELLULOSE OF THE FIBERS A METHYL METHACRYLATE POLYMER FORMING HYDROPHILIC CELLULOSE METHYL METHACRYLATE GRAFT COPOLYMER, FORMING THE GRAFTED FIBERS INTO A SHEET, DRYING THE SHEET, AND WETTING THE CELLULOSE METHYL METHACRYLATE GRAFT COPOLYMER WITH A SOLVENT OF THE GROUP CONSISTING OF ACETONE, BENZENE, CHLOROFORM AND CARBON TETRACHLORIDE TO FORM HYDROPHOBIC CELLULOSE METHYL METHACRYLATE GRAFT COPOLYMER.
References Cited (Backward Citations)
CA582773A
Cited
US2901813A
Cited
US2784052A
Cited
US2922768A
Cited
US2956899A
Cited
US3073667A
Cited
US3065041A
Cited
US3081143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |