US3265581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of purifying interferon with alumino-silicate adsorbents
Assignee: Glaxo Laboratories Ltd
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Filing: 1963-08-02
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Granted: 1966-08-09
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Expires: 1983-08-02
Abstract
No abstract record available.
Inventors
- 👤 Fantes Karl Heinz
- 👤 O'neill Cecil Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:50
CPC Classifications
C; C07; C07K; C07K14/00; C07K14/435; C07K14/52; C07K14/555
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A PROCESS FOR THE PURIFICATION AND/OR CONCENTRATION OF MATERIAL CONTAINING INTERFERON COMPRISING ADSROBING SAID INTERFERON AT A PH LESS THAN 6 FROM AN AQUEOUS MEDIUM ONTO AT LEAST ONE FINE PARTICULATE ALUMINO-SILICATE ADSORBENT HAVING A MOLECULAR RATION OF SIO2 TO AL2O3 GREATER THAN 5.
Claim 2
Dependent Claim
44 words
A PROCESS FOR THE PURIFICATION AND/OR CONCENTRATION OF MATERIAL CONTAINING INTERFERON COMPRISING ADSROBING SAID INTERFERON AT A PH LESS THAN 6 FROM AN AQUEOUS MEDIUM ONTO AT LEAST ONE FINE PARTICULATE ALUMINO-SILICATE ADSORBENT HAVING A MOLECULAR RATION OF SIO2 TO AL2O3 GREATER THAN 5.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |