US2821051A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sharpener for hypodermic needles
Assignee: Individual
•
Filing: 1955-02-10
•
Granted: 1958-01-28
•
Expires: 1975-02-10
Abstract
No abstract record available.
Inventors
- 👤 Franz Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:48
CPC Classifications
B; B24; B24B; B24B19/00; B24B19/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US349204A
Cited
US510168A
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US1254900A
Cited
US1382794A
Cited
US1464203A
Cited
US1627983A
Cited
US2020709A
Cited
US2278784A
Cited
US2629974A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |