US3489647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artificial organ for membrane dialysis of biological fluids
Assignee: Dow Silicones Corp
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Filing: 1964-05-06
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Granted: 1970-01-13
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Expires: 1984-05-06
Abstract
No abstract record available.
Inventors
- 👤 Theodor Kolobow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:02
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/24; B01D61/28; B01D63/00; B01D63/10; B01D2313/00; B01D2313/14; B01D2313/143
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE1064199B
Cited
US3034505A
Cited
US3060934A
Cited
US3212642A
Cited
US3212498A
Cited
US3332746A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |