Patent US2551004A successfully refreshed from Google Patents.
US2551004A
Expired / Lapsed
US
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Ventilator
Assignee: CANYON SWI Inc
•
Filing: 1947-11-06
•
Granted: 1951-05-01
•
Expires: 1967-11-06
Abstract
No abstract record available.
Inventors
- 👤 Jay P Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:22
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/02; F24F7/025; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0876; Y10T292/0885; Y10T292/25
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2141923A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |