US2940377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilator
Assignee: CANYON SWI Inc
•
Filing: 1957-07-29
•
Granted: 1960-06-14
•
Expires: 1977-07-29
Abstract
No abstract record available.
Inventors
- 👤 Fred P Darnell
- 👤 Walter J Skipworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:19
CPC Classifications
E; E04; E04D; E04D13/00; E04D13/03; E04D13/035; E04D13/0351; F; F24; F24F; F24F7/00; F24F7/02; F24F11/00; F24F11/30; F24F11/32; F24F11/33; F24F11/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US950839A
Cited
US1090389A
Cited
US1380207A
Cited
US1887484A
Cited
GB579572A
Cited
US2551004A
Cited
US2766859A
Cited
US2814979A
Cited
US2825275A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |