Patent US2560643A successfully refreshed from Google Patents.
US2560643A
Expired / Lapsed
US
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Nail with spreading points
Assignee: Elastic Stop Nut Corp
•
Filing: 1945-08-01
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Granted: 1951-07-17
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Expires: 1965-08-01
Abstract
No abstract record available.
Inventors
- 👤 Hallock Robert Lay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:56
CPC Classifications
F; F16; F16B; F16B15/00; F16B15/04; Y; Y10; Y10S; Y10S411/00; Y10S411/921
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE166703C
Cited
US831303A
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US931272A
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US1025009A
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US1154482A
Cited
DE389217C
Cited
US1849605A
Cited
USRE22758E
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-16 | 1955-01-15 | 1955-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-16 | 1959-01-15 | 1959-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-16 | 1963-01-15 | 1963-07-17 | $7700.00 | Window Closed / Lapsed |