US2908614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of dextran in freeze-drying process
Assignee: Glaxo Laboratories Ltd
•
Filing: 1955-07-29
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Granted: 1959-10-13
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Expires: 1975-07-29
Abstract
No abstract record available.
Inventors
- 👤 Muggleton Peter William
- 👤 Ungar Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:18
CPC Classifications
A; A01; A01N; A01N1/00; A01N1/10; A01N1/12; C; C12; C12N; C12N1/00; C12N1/04; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/886; Y10S435/887
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
63 words
IN A METHOD OF DRYING A SENSITIVE BIOLOGICAL PRODUCT IN WHICH SAID PRODUCT OF THE CLASS CONSISTING OF LIVING ORGANISMS, KILLED ORGANISMS, ENZYMES, HORMONES AND ORGAN EXTRACTS IS INCORPORATED IN AN AQUEOUS PROTECTIVE MEDIUM, SAID MEDIUM IS FROZEN AND ICE IS DIRECTLY SUBLIMED IN VACUO, THE STEP OF UNIFORMLY INCORPORATING SAID SENSITIVE BIOLOGICAL PRODUCT IN AN AQUEOUS DEXTRAN SOLUTION AS SAID PROTECTIVE MEDIUM.
Claim 2
Dependent Claim
63 words
IN A METHOD OF DRYING A SENSITIVE BIOLOGICAL PRODUCT IN WHICH SAID PRODUCT OF THE CLASS CONSISTING OF LIVING ORGANISMS, KILLED ORGANISMS, ENZYMES, HORMONES AND ORGAN EXTRACTS IS INCORPORATED IN AN AQUEOUS PROTECTIVE MEDIUM, SAID MEDIUM IS FROZEN AND ICE IS DIRECTLY SUBLIMED IN VACUO, THE STEP OF UNIFORMLY INCORPORATING SAID SENSITIVE BIOLOGICAL PRODUCT IN AN AQUEOUS DEXTRAN SOLUTION AS SAID PROTECTIVE MEDIUM.
Claim 3
Dependent Claim
29 words
THE METHOD OF CLAIM 1 IN WHICH GLUCOSE IS ALSO ADDED TO SAID AQUEOUS MEDIUM PRIOR TO FREEZING WHEREBY THE MOISTURE CONTENT OF THE FINAL PRODUCT MAY BE CONTROLLED.
References Cited (Backward Citations)
US2642376A
Cited
US2602082A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |