Patent US3102113A successfully refreshed from Google Patents.
US3102113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unoriented particulate deae-cellulose ion exchange material
Assignee: Glaxo Group Ltd
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Filing: 1960-10-25
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Granted: 1963-08-27
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Expires: 1980-10-25
Abstract
No abstract record available.
Inventors
- 👤 Raper Alan Humphrey
- 👤 Lockwood Arthur Ronald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:45
CPC Classifications
B; B01; B01J; B01J41/00; B01J41/08; B01J41/12; B01J41/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
AN ION-EXCHANGE MATERIAL CONSISTING OF DISCRETE PARTICLES NOT LONGER THAN 10 BRITISH STANDARD MESH OF UNORIENTED DIETHYLAMINOETHYLATED CELLULOSE HAVING AN IONEXCHANGE CAPACITY OF FROM 0.1 TO 2.0 MEQ./G., DRY WEIGHT, SAID UNDRIENTED CELLULOSE BEING A MONOFILAMENT OF 1,000 TO 60,000 DENIER PREPARED BY SLOW EXTRUSION OF SODIUM XANTHATE CELLULOSE WITHOUT TENSION INTO AN ACID BATH.
Claim 2
Dependent Claim
55 words
AN ION-EXCHANGE MATERIAL CONSISTING OF DISCRETE PARTICLES NOT LONGER THAN 10 BRITISH STANDARD MESH OF UNORIENTED DIETHYLAMINOETHYLATED CELLULOSE HAVING AN IONEXCHANGE CAPACITY OF FROM 0.1 TO 2.0 MEQ./G., DRY WEIGHT, SAID UNDRIENTED CELLULOSE BEING A MONOFILAMENT OF 1,000 TO 60,000 DENIER PREPARED BY SLOW EXTRUSION OF SODIUM XANTHATE CELLULOSE WITHOUT TENSION INTO AN ACID BATH.
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) | 1966-08-26 | 1967-02-25 | 1967-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-26 | 1971-02-25 | 1971-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-26 | 1975-02-25 | 1975-08-27 | $7700.00 | Window Closed / Lapsed |