US3509899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heart and lung resuscitator
Assignee: Individual
•
Filing: 1967-08-07
•
Granted: 1970-05-05
•
Expires: 1987-08-07
Abstract
No abstract record available.
Inventors
- 👤 Carl E Hewson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:10
CPC Classifications
A; A61; A61H; A61H31/00; A61H31/004; A61H31/006; A61M; A61M16/00; A61H2201/00; A61H2201/12; A61H2201/1238; Y; Y02; Y02A; Y02A90/00; Y02A90/10; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2703; Y10T137/2705; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86413
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
CA458842A
Cited
US1767702A
Cited
US2026704A
Cited
US2309848A
Cited
US2965117A
Cited
US3160486A
Cited
US3291153A
Cited
US3209748A
Cited
US3270757A
Cited
US3364924A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-04 | 1973-11-03 | 1974-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-04 | 1977-11-03 | 1978-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-04 | 1981-11-03 | 1982-05-05 | $7700.00 | Window Closed / Lapsed |