Patent US2786469A successfully refreshed from Google Patents.
US2786469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tracheal tube assembly and tracheal plug
Assignee: Individual
•
Filing: 1953-12-18
•
Granted: 1957-03-26
•
Expires: 1973-12-18
Abstract
No abstract record available.
Inventors
- 👤 Cohen William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:01
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/04; A61M16/0465; A61M16/0402; A61M16/0427; A61M16/0429; A61M16/0488; A61M16/0497
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-25 | 1960-09-24 | 1961-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-25 | 1964-09-24 | 1965-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-25 | 1968-09-24 | 1969-03-26 | $7700.00 | Window Closed / Lapsed |