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US3538918A
Expired / Lapsed
US
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Tracheo-bronchostomy tube
Assignee: Horizon Industries Ltd
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Filing: 1968-10-09
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Granted: 1970-11-10
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Expires: 1988-10-09
Abstract
No abstract record available.
Inventors
- 👤 Harvey J Engelsher
- 👤 Peter C Hofstra
- 👤 Robert W Mckirdy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:24
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/04; A61M16/0463; A61M16/0402; A61M16/0427; A61M16/0475; A61M16/0465; A61M16/0488; Y; Y10; Y10S; Y10S128/00; Y10S128/911; Y10S128/912
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) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |