Patent US3499450A successfully refreshed from Google Patents.
US3499450A
Expired / Lapsed
US
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Pediatric size tracheal tube
Assignee: Dow Silicones Corp
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Filing: 1967-10-25
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Granted: 1970-03-10
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Expires: 1987-10-25
Abstract
No abstract record available.
Inventors
- 👤 Arthur H Rathjen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:07
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/04; A61M16/0488; A61M16/0497; A61M16/0465; A61M2205/00; A61M2205/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3334631A
Cited
US3395711A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |