Patent US2764981A successfully refreshed from Google Patents.
US2764981A
Expired / Lapsed
US
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Multiple dosage syringe
Assignee: Individual
•
Filing: 1955-09-01
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Granted: 1956-10-02
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Expires: 1975-09-01
Abstract
No abstract record available.
Inventors
- 👤 Norman D Helmer
- 👤 Fred H Easton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:56
CPC Classifications
A; A61; A61M; A61M31/00; A61M5/00; A61M5/178; A61M5/31; A61M5/315; A61M5/31565; A61M5/3159; A61M5/31593; A61M5/31595; A61M5/31501; A61M5/31505; A61M5/31566; A61M5/3157; A61M5/31591
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) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |