US2904034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lung ventilating apparatus
Assignee: Jefferson Medical College of Philadelphia
•
Filing: 1954-06-16
•
Granted: 1959-09-15
•
Expires: 1974-06-16
Abstract
No abstract record available.
Inventors
- 👤 George J Haupt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:21
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/0003; A61M16/0009; A61M16/0057; A61M16/0081; A61M16/0075
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1210149A
Cited
US1188565A
Cited
US1945680A
Cited
US2079952A
Cited
US2063043A
Cited
FR796685A
Cited
US2270313A
Cited
US2292527A
Cited
US2591120A
Cited
US2648331A
Cited
US2699163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |