Patent US2219209A successfully refreshed from Google Patents.
US2219209A
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Electrodialysis of papain
Assignee: PERFECT MANUFACTURING Co
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Filing: 1937-11-18
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Granted: 1940-10-22
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Expires: 1957-11-18
Abstract
No abstract record available.
Inventors
- 👤 Carl W Neufeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:10
CPC Classifications
C; C12; C12N; C12N13/00; A; A23; A23L; A23L13/00; A23L13/70; A23L13/72; A23L13/74; C12N9/00; C12N9/14; C12N9/48; C12N9/50; Y; Y10; Y10S; Y10S435/00; Y10S435/814
Claims Analysis
Total Claims: 0
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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) | 1943-10-22 | 1944-04-22 | 1944-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-10-22 | 1948-04-22 | 1948-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-10-22 | 1952-04-22 | 1952-10-22 | $7700.00 | Window Closed / Lapsed |