Patent US2452539A successfully refreshed from Google Patents.
US2904044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aspirating syringe
Assignee: Astra USA Inc
•
Filing: 1956-12-07
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Granted: 1959-09-15
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Expires: 1976-12-07
Abstract
No abstract record available.
Inventors
- 👤 Borje F Jalar
- 👤 Fritz G Nordstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:02
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/24; A61M2005/2403; A61M2005/2414; A61M5/31; A61M5/3148; A61M5/315; A61M5/31511; A61M5/31515
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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 |