Patent US2635428A successfully refreshed from Google Patents.
US2635428A
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US
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Control means for hydraulic pump and motor systems
Assignee: Rockwell Manufacturing Co
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Filing: 1948-08-09
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Granted: 1953-04-21
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Expires: 1968-08-09
Abstract
No abstract record available.
Inventors
- 👤 Walter H Marsh
- 👤 William I Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:48
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/4035; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7764; Y10T137/7765; Y10T137/7781; Y10T137/7832; Y10T137/8593; Y10T137/87265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US941409A
Cited
US1511425A
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US2065219A
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US2331218A
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US2354634A
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US2450733A
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 |