Patent US3478550A successfully refreshed from Google Patents.
US3478550A
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US
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Key retaining device
Assignee: WILLIAM R SALVESEN
•
Filing: 1967-01-17
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Granted: 1969-11-18
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Expires: 1987-01-17
Abstract
No abstract record available.
Inventors
- 👤 William R Salvesen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:35
CPC Classifications
A; A44; A44B; A44B15/00; Y; Y10; Y10T; Y10T70/00; Y10T70/80; Y10T70/8432; Y10T70/8676; Y10T70/8757
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US486419A
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US1141992A
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US1571425A
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US2129436A
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US2307808A
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FR928705A
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FR1049040A
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US2694844A
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US2823537A
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US2855775A
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US3257696A
Cited
US3286315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |