US2635581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid servo apparatus
Assignee: Individual
•
Filing: 1949-01-27
•
Granted: 1953-04-21
•
Expires: 1969-01-27
Abstract
No abstract record available.
Inventors
- 👤 Horace E Karig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:53
CPC Classifications
F; F15; F15B; F15B9/00; F15B9/02; F15B9/08; F15B9/10; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2322; Y10T137/2409
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1978502A
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US2148230A
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US2129586A
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US2221150A
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US2154718A
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US2177674A
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US2344547A
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US2374708A
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US2379306A
Cited
US2475894A
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US2453328A
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US2516333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-20 | 1956-10-20 | 1957-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-20 | 1960-10-20 | 1961-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-20 | 1964-10-20 | 1965-04-21 | $7700.00 | Window Closed / Lapsed |