Patent US3457944A successfully refreshed from Google Patents.
US3457944A
Expired / Lapsed
US
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Hemodialysis system
Assignee: Sweden Freezer Manufacturing Co
•
Filing: 1966-03-15
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Granted: 1969-07-29
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Expires: 1986-03-15
Abstract
No abstract record available.
Inventors
- 👤 James E Cary
- 👤 Harvey F Swenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:58
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/24; B01D61/28; B01D2313/00; B01D2313/50; B01D2313/502; B01D2313/60; B01D2313/90; B01D2313/903; Y; Y10; Y10T; Y10T137/00; Y10T137/6416; Y10T137/6606
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2155273A
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US2411239A
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US2720879A
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US2880501A
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US2969150A
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US3072259A
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US3158160A
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US3285779A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |