Patent US2825147A successfully refreshed from Google Patents.
US2825147A
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Assignee: Silver Engineering Works Inc
•
Filing: 1954-11-08
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Granted: 1958-03-04
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Expires: 1974-11-08
Abstract
No abstract record available.
Inventors
- 👤 Harold F Silver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:52
CPC Classifications
F; F26; F26B; F26B17/00; F26B17/10; F26B17/101
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US788741A
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US1550992A
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US2034467A
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US2339923A
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US2378542A
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US2506273A
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US2622341A
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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) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |