US2506342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Placenta filter
Assignee: Individual
•
Filing: 1947-08-09
•
Granted: 1950-05-02
•
Expires: 1967-08-09
Abstract
No abstract record available.
Inventors
- 👤 Arnold C Burke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:10
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/10; A61B6/107; G; G21; G21K; G21K1/00; G21K1/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB191215678A
Cited
US1535359A
Cited
DE450994C
Cited
US2094103A
Cited
US2216326A
Cited
US2405444A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-01 | 1953-10-31 | 1954-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-01 | 1957-10-31 | 1958-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-01 | 1961-10-31 | 1962-05-02 | $7700.00 | Window Closed / Lapsed |