Patent US3738813A successfully refreshed from Google Patents.
US3738813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mass transfer device and method of making same
Assignee: Individual
•
Filing: 1971-06-04
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Granted: 1973-06-12
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Expires: 1991-06-04
Abstract
Abstract A TRANSFER DEVICE WHICH IS PARTICULARLY USEABLE AS A DEVICE FOR OXYGENATING BLOOD. THE DEVICE SIMPLY CONSISTS OF A TUBULAR SUPPORT FORM ABOUT WHICH AN EMBOSSED FILM AND A PLAIN FILM ARE WRAPPED OR COILED WHILE SUITABLY SEALED TOGETHER AFTER WHICH FLOW MEMBERS IN THE FORM OF END CAPS ARE APPLIED. THE TRANSFER DEVICE IS FORMED IN A SIMPLE WRAPPING OPERATIONN AND THE EMBOSSED FILM MAY BE EMBOSSED IMEDIATELY IN ADVANCE OF THE WRAPPING OPERATION.
Inventors
- 👤 W Esmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:09
CPC Classifications
B; B01; B01D; B01D63/00; B01D63/10; B01D63/107; B01D2315/00; B01D2315/04
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |