Patent US3305377A successfully refreshed from Google Patents.
US3305377A
Expired / Lapsed
US
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Manufacture of regenerated cellulose fibres
Assignee: Akzo Nobel UK PLC
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Filing: 1963-10-01
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Granted: 1967-02-21
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Expires: 1983-10-01
Abstract
No abstract record available.
Inventors
- 👤 Mahomed Ramon Sidick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:02
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/06; D01F2/08; D01F2/10; C; C08; C08L; C08L1/00; C08L1/08; C08L1/22; C08L1/24
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
39 words
REGENERATED CELLULOSE FIBRES CONTAINING, UNIFORMLY PHYSICALLY DISPERSED THEREIN, AN AMINOETHYL AND A DIETHYLAMINOETHYL ETHER OF CELLULOSE IN PROPORTIONS SUCH AS TO GIVE A TOTAL NITROGEN CONTENT JOF BETWEEN ABOUT 0.165 AND ABOUT 0.215 PERCENT BY WEIGHT OF THE FIBRE.
Claim 2
Dependent Claim
39 words
REGENERATED CELLULOSE FIBRES CONTAINING, UNIFORMLY PHYSICALLY DISPERSED THEREIN, AN AMINOETHYL AND A DIETHYLAMINOETHYL ETHER OF CELLULOSE IN PROPORTIONS SUCH AS TO GIVE A TOTAL NITROGEN CONTENT JOF BETWEEN ABOUT 0.165 AND ABOUT 0.215 PERCENT BY WEIGHT OF THE FIBRE.
Claim 3
Dependent Claim
55 words
A VISCOSE PROCESS FOR MAKING ACID DYEABLE FIBRES OF REGENERATED CELLULOSE COMPRISING INCORPORATING A SODIUM XANTHATE SOLUTION OF AN AMINOETHYL ETHER OF CELLULOSE AND OF A DIETHYLAMINOETHYL ETHER OF CELLULOSE IN A VISCOSE IN PROPORTIONS SUCH AS TO GIVE A TOTAL NITROGEN CONTENT OF BETWEEN ABOUT 0.165 AND ABOUT 0.215 PERCENT BY WEIGHT OF CELLULOSE.
Claim 4
Dependent Claim
55 words
A VISCOSE PROCESS FOR MAKING ACID DYEABLE FIBRES OF REGENERATED CELLULOSE COMPRISING INCORPORATING A SODIUM XANTHATE SOLUTION OF AN AMINOETHYL ETHER OF CELLULOSE AND OF A DIETHYLAMINOETHYL ETHER OF CELLULOSE IN A VISCOSE IN PROPORTIONS SUCH AS TO GIVE A TOTAL NITROGEN CONTENT OF BETWEEN ABOUT 0.165 AND ABOUT 0.215 PERCENT BY WEIGHT OF CELLULOSE.
References Cited (Backward Citations)
US2656241A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |