Patent US2634708A successfully refreshed from Google Patents.
US2634708A
Expired / Lapsed
US
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Power booster mechanism with poppet valve controls for automotive steering gears
Assignee: Individual
•
Filing: 1948-09-24
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Granted: 1953-04-14
•
Expires: 1968-09-24
Abstract
No abstract record available.
Inventors
- 👤 Francis W Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:18
CPC Classifications
F; F15; F15B; F15B9/00; F15B9/02; F15B9/08; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86919; Y10T137/877; Y10T137/87829
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2237400A
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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) | 1956-04-13 | 1956-10-13 | 1957-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-13 | 1960-10-13 | 1961-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-13 | 1964-10-13 | 1965-04-14 | $7700.00 | Window Closed / Lapsed |