Patent US3606669A successfully refreshed from Google Patents.
US3606669A
Expired / Lapsed
US
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Method of making tracheal tube device
Assignee: Philip Morris USA Inc
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Filing: 1969-05-26
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Granted: 1971-09-21
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Expires: 1989-05-26
Abstract
Abstract A TRACHEAL TUBE DEVICE HAVING AN OUTER TUBE AND AN INNER TUBE INSERTABLE IN AND REMOVABLE WITH RESPECT TO THE OUTER TUBE IS MADE BY A METHOD IN WHICH THE OUTER TUBE IS CAST IN INITIALLY STRAIGHT FORM FROM A THERMOPLASTIC MATERIAL AND BEFORE COOLING IS BENT INTO THE DESIRED RADIUS AND UPON COOLING THE TUBE IS RELATIVELY RIGID AND STIFF IN THE PRE-SET CURVED FORM, THE INNER TUBE LIKEWISE BEING CAST IN A STRAIGHT FORM BUT OF AN ELASTOMERIC MATERIAL WHICH REMAINS FLEXIBLE WHEN COOLED. IN USE THE INNER TUBE IS INSERTED IN THE OUTER TUBE AND READILY CONFORMS TO THE RADIUS AND SHAPE THEREOF. THE INNER TUBE IS DISPOSABLE AND IS EASILY REMOVED AND REPLACED BY A NEW STERILE TUBE.
Inventors
- 👤 Mern S Kemble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:46
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/04; A61M16/0465; A61M16/0402; A61M16/0427; A61M16/0429; A61M16/0488; A61M16/0497; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/4984
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |