US2991843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilator construction
Assignee: Safeguard Corp
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Filing: 1958-12-30
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Granted: 1961-07-11
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Expires: 1978-12-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Vincent G Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:48
CPC Classifications
E; E06; E06B; E06B7/00; E06B7/02; E06B7/03; F; F24; F24F; F24F8/00; F24F8/10; F24F8/108; Y; Y10; Y10S; Y10S264/00; Y10S264/13; Y10S52/00; Y10S52/03; Y10S55/00; Y10S55/13; Y10T; Y10T24/00; Y10T24/44; Y10T24/44641; Y10T24/44932
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) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |