Patent US3467121A successfully refreshed from Google Patents.
US3467121A
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US
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Dual fluid systems
Assignee: Bowles Engineering Corp
•
Filing: 1965-10-21
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Granted: 1969-09-16
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Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 Romald E Bowles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:59
CPC Classifications
F; F15; F15C; F15C1/00; Y; Y10; Y10S; Y10S261/00; Y10S261/54; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/0352; Y10T137/206; Y10T137/2076; Y10T137/2087; Y10T137/2109; Y10T137/2273
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2173330A
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US3075548A
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US3182674A
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US3212515A
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US3174497A
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US3234955A
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US3155825A
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US3267946A
Cited
US3273377A
Cited
US3272215A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-15 | 1973-03-17 | 1973-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-15 | 1977-03-17 | 1977-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-15 | 1981-03-17 | 1981-09-16 | $7700.00 | Window Closed / Lapsed |