US2843524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of adrenocorticotrophin by adsorption on diatomaceous earth
Assignee: Armour and Co
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Filing: 1956-12-28
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Granted: 1958-07-15
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Expires: 1976-12-28
Abstract
No abstract record available.
Inventors
- 👤 Irby M Bunding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:47
CPC Classifications
A; A61; A61K; A61K38/00; A61K38/16; A61K38/17; A61K38/33; A61K38/35
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A PROCESS FOR PREPARING AN ADRENOCORTICOTROPHIN SUBSTANCE FROM A SOLUTION CONTAINING THE SUBSTANCE COMPRISING ADSORBING SAID SUBSTANCE ON DIATOMACEOUS EARTH MATERIAL AT A PH ABOVE 3.0 AND ELUTING THE ADSORBED SUBSTANCE AT A PH WHICH IS LOWER THAN THE ADSORPTION PH AND WHICH IS WITHIN THE PH RANGE FROM 1.0 TO 4.5.
Claim 2
Dependent Claim
52 words
A PROCESS FOR PREPARING AN ADRENOCORTICOTROPHIN SUBSTANCE FROM A SOLUTION CONTAINING THE SUBSTANCE COMPRISING ADSORBING SAID SUBSTANCE ON DIATOMACEOUS EARTH MATERIAL AT A PH ABOVE 3.0 AND ELUTING THE ADSORBED SUBSTANCE AT A PH WHICH IS LOWER THAN THE ADSORPTION PH AND WHICH IS WITHIN THE PH RANGE FROM 1.0 TO 4.5.
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) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |