Patent US2646037A successfully refreshed from Google Patents.
US2646037A
Expired / Lapsed
US
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Locking means for folding laryngoscopes
Assignee: Welch Allyn Inc
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Filing: 1950-06-23
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Granted: 1953-07-21
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Expires: 1970-06-23
Abstract
No abstract record available.
Inventors
- 👤 Charles S Cook
- 👤 Harry L Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:24
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/267; A61B1/06; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32532; Y10T403/32549; Y10T403/32557; Y10T403/32581
Claims Analysis
Total Claims: 0
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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) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |