US2582589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vitamin b12 purification process
Assignee: Abbott Laboratories
•
Filing: 1949-05-13
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Granted: 1952-01-15
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Expires: 1969-05-13
Abstract
No abstract record available.
Inventors
- 👤 Howard H Fricke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:00
CPC Classifications
C; C12; C12P; C12P19/00; C12P19/26; C12P19/28; C12P19/42; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/886; Y10S435/897
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2443485A
Cited
US1872775A
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US2292841A
Cited
US2342172A
Cited
US2378449A
Cited
GB590956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-14 | 1955-07-16 | 1956-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-14 | 1959-07-16 | 1960-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-14 | 1963-07-16 | 1964-01-15 | $7700.00 | Window Closed / Lapsed |