Patent US3729377A successfully refreshed from Google Patents.
US3729377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Envelope oxygenator for blood having inflatable portions and process of using same
Assignee: 3M Co
•
Filing: 1971-03-12
•
Granted: 1973-04-24
•
Expires: 1991-03-12
Abstract
Abstract A BLOOD OXYGENATOR WHICH DEFINES A FLOW PASSAGE, AND HAVING MEANS FOR INTRODUCING A STREAM OF BLOOD INTO ONE END OF THE FLOW PASSAGE AND MEANS FOR REMOVING BLOOD FROM THE OTHER END. THE OXYGENATOR HAS MEANS DEFINING A FLUID PRESSURIZABLE SECTION TO PROVIDE DIMENSIONAL STABIL- ITY THERETO, FOR EXAMPLE, TO CONTROL THE CROSS SECTIONAL AREA OF THE OXYGENATING PORTION OF THE FLOW PASSAGE OR T MAKE THE OXYGENATOR SELF-SUPPORTNG.
Inventors
- 👤 R Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:57
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/32; A61M1/322; Y; Y10; Y10S; Y10S128/00; Y10S128/03; Y10S261/00; Y10S261/28
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |