US2439271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilator
Assignee: Individual
•
Filing: 1942-05-14
•
Granted: 1948-04-06
•
Expires: 1962-05-14
Abstract
No abstract record available.
Inventors
- 👤 James B Shaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:23
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/02; F24F7/025; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/1014; Y10T292/1021
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US87668A
Cited
US266015A
Cited
US283913A
Cited
US595127A
Cited
US606057A
Cited
US683225A
Cited
US957776A
Cited
US1427859A
Cited
US1532635A
Cited
US1525649A
Cited
US1594351A
Cited
US1633579A
Cited
CH130232A
Cited
US1785540A
Cited
US1828052A
Cited
US2141923A
Cited
US2082955A
Cited
US2272928A
Cited
US2225349A
Cited
US2191774A
Cited
US2349283A
Cited
US2350102A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-06 | 1951-10-06 | 1952-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-06 | 1955-10-06 | 1956-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-06 | 1959-10-06 | 1960-04-06 | $7700.00 | Window Closed / Lapsed |