US2869541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Syringe structure
Assignee: Individual
•
Filing: 1956-01-13
•
Granted: 1959-01-20
•
Expires: 1976-01-13
Abstract
No abstract record available.
Inventors
- 👤 Norman D Helmer
- 👤 Fred H Easton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:18
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/178; A61M5/31; A61M5/315; A61M5/31565; A61M5/3159; A61M5/31593; A61M5/31595; Y; Y10; Y10T; Y10T403/00; Y10T403/20; Y10T403/32; Y10T403/32549
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE67033C
Cited
US1434381A
Cited
US1687324A
Cited
GB551545A
Cited
US2460039A
Cited
US2373520A
Cited
DE807113C
Cited
US2578812A
Cited
US2742041A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |