US2584450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tracheotomy inhaler apparatus
Assignee: University of Minnesota Twin Cities
•
Filing: 1947-09-02
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Granted: 1952-02-05
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Expires: 1967-09-02
Abstract
No abstract record available.
Inventors
- 👤 George W Holt
- 👤 William G Kubicek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:12
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/10; A61M16/14; A61M16/16; A61M16/021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US374402A
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US1169996A
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US1202391A
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DE670977C
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US2245696A
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FR862559A
Cited
US2267009A
Cited
US2228983A
Cited
US2348074A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-04 | 1955-08-06 | 1956-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-04 | 1959-08-06 | 1960-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-04 | 1963-08-06 | 1964-02-05 | $7700.00 | Window Closed / Lapsed |