US3506406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable membrane blood oxygenator
Assignee: Individual
•
Filing: 1967-06-20
•
Granted: 1970-04-14
•
Expires: 1987-06-20
Abstract
No abstract record available.
Inventors
- 👤 Alexander A Birch Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:47
CPC Classifications
B; B01; B01D; B01D63/00; B01D63/06; A; A61; A61M; A61M1/00; A61M1/14; A61M1/16; A61M1/1698; B01D2313/00; B01D2313/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2972349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-13 | 1973-10-13 | 1974-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-13 | 1977-10-13 | 1978-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-13 | 1981-10-13 | 1982-04-14 | $7700.00 | Window Closed / Lapsed |