US2279620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilator
Assignee: W F HIRSCHMAN CO Inc
•
Filing: 1938-11-02
•
Granted: 1942-04-14
•
Expires: 1958-11-02
Abstract
No abstract record available.
Inventors
- 👤 William F Hirschman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:26
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/02; F24F7/025; F04; F04D; F04D25/00; F04D25/02; F04D25/08; F04D25/082; F04D29/00; F04D29/58; F04D29/5806
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-04-13 | 1945-10-13 | 1946-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-04-13 | 1949-10-13 | 1950-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-04-13 | 1953-10-13 | 1954-04-14 | $7700.00 | Window Closed / Lapsed |