US2647743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring device
Assignee: EASTERN METALS RES CO Inc
•
Filing: 1949-06-29
•
Granted: 1953-08-04
•
Expires: 1969-06-29
Abstract
No abstract record available.
Inventors
- 👤 William J Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:06
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/02; F16F1/04; F16F1/10; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49609
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US377489A
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US122288A
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GB442681A
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US1977546A
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US2175516A
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US2192101A
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US2363113A
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US2457705A
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GB609673A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |