US2816765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weight-compensated arrowhead
Assignee: Individual
•
Filing: 1954-01-04
•
Granted: 1957-12-17
•
Expires: 1974-01-04
Abstract
No abstract record available.
Inventors
- 👤 Harry C Stockfleth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:36
CPC Classifications
F; F42; F42B; F42B6/00; F42B6/02; F42B6/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2279833A
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US2486952A
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GB589629A
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US2555214A
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US2613936A
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US2681096A
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US2629600A
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US2676017A
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US2686055A
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US2684852A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-16 | 1961-06-17 | 1961-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-16 | 1965-06-17 | 1965-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-16 | 1969-06-17 | 1969-12-17 | $7700.00 | Window Closed / Lapsed |