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Patent US2920859A successfully refreshed from Google Patents.
US2920859A
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US
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Balanced valve means
Assignee: Bendix Aviation Corp
•
Filing: 1952-06-14
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Granted: 1960-01-12
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Expires: 1972-06-14
Abstract
No abstract record available.
Inventors
- 👤 Bradford B Holmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:57
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/0611; G05D16/0613
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2254209A
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US347156A
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US174957A
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US647706A
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US826714A
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US1062793A
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US1125596A
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US1272957A
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US1396501A
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US2076157A
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US2403029A
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US2516996A
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US2575875A
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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) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |