US3216780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Textile materials and process for manufacturing them
Assignee: Bradford Dyers Association Ltd
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Filing: 1960-10-06
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Granted: 1965-11-09
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Expires: 1980-10-06
Abstract
No abstract record available.
Inventors
- 👤 Landells George
- 👤 Manogue Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:55
CPC Classifications
D; D21; D21H; D21H25/00; D21H25/02; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/47; D21H17/49; D21H5/00; D21H5/12; D21H5/1272; D21H5/1281; D21H11/00; D21H11/16; D21H11/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A PROCESS FOR THE TREATMENT OF MATERIAL COMPRISING A CELLULOSIC SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF CELLULOSE AND CELLULOSE DERIVATIVE WHICH STILL RETAIN REPLACEABLE HYDROGEN ATOMS, CONSISTING ESSENTIALLY OF CONTACTING SAID MATERIAL WITH AN AQUEOUS LIQUOR COMPRISING (1) AT LEAST ONE METHOLATED NITROGEN COMPOUND AND (2) AND ACID, SWELLING THE MATERIAL WITH SAID LIQUOR, MAINTAINING THE MATERIAL IN THE WET SWOLLEN CONDITION WHILE PERMITTING THE REACTION TO TAKE PLACE BETWEEN THE CONTENTS OF THE LIQUOR AND SAID MATERIAL SO THAT CHEMICAL MODIFICATION OF THE CELLULOSE MOLEULES OCCURS CAUSING THE CELLULOSE TO BECOME SUBSTANTIALLY INSOLUBLE IN CUPRAMMONIUM HYDROXIDE SOLUTIN WHILE MAINTAINING SWELLABILITY IN WATER, REMOVING ACIDIC MATTER AND UNREACTED REAGENTS FROM THE MATERIAL AND DRYING SAID FABRIC.
Claim 2
Dependent Claim
117 words
A PROCESS FOR THE TREATMENT OF MATERIAL COMPRISING A CELLULOSIC SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF CELLULOSE AND CELLULOSE DERIVATIVE WHICH STILL RETAIN REPLACEABLE HYDROGEN ATOMS, CONSISTING ESSENTIALLY OF CONTACTING SAID MATERIAL WITH AN AQUEOUS LIQUOR COMPRISING (1) AT LEAST ONE METHOLATED NITROGEN COMPOUND AND (2) AND ACID, SWELLING THE MATERIAL WITH SAID LIQUOR, MAINTAINING THE MATERIAL IN THE WET SWOLLEN CONDITION WHILE PERMITTING THE REACTION TO TAKE PLACE BETWEEN THE CONTENTS OF THE LIQUOR AND SAID MATERIAL SO THAT CHEMICAL MODIFICATION OF THE CELLULOSE MOLEULES OCCURS CAUSING THE CELLULOSE TO BECOME SUBSTANTIALLY INSOLUBLE IN CUPRAMMONIUM HYDROXIDE SOLUTIN WHILE MAINTAINING SWELLABILITY IN WATER, REMOVING ACIDIC MATTER AND UNREACTED REAGENTS FROM THE MATERIAL AND DRYING SAID FABRIC.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |