US2626799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prestressed spring
Assignee: Individual
•
Filing: 1946-08-16
•
Granted: 1953-01-27
•
Expires: 1966-08-16
Abstract
No abstract record available.
Inventors
- 👤 John D Howell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:29
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/02; F16F3/00; F16F3/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49609
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US301963A
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US489321A
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US1577767A
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US1590211A
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US1546896A
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US1672513A
Cited
US1818040A
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US1847125A
Cited
US2144915A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-27 | 1956-07-28 | 1957-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-27 | 1960-07-28 | 1961-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-27 | 1964-07-28 | 1965-01-27 | $7700.00 | Window Closed / Lapsed |