US2438690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Throttle control system
Assignee: Niles Bement Pond Co
•
Filing: 1943-10-16
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Granted: 1948-03-30
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Expires: 1963-10-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Douglas H Andrews
- 👤 Donald E Lipfert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:31
CPC Classifications
F; F02; F02D; F02D9/00; F02D2700/00; F02D2700/02; F02D2700/0217; F02D2700/0225; F02D2700/0228; F02D2700/023; F02D2700/0235; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7748; Y10T137/775; Y10T137/8158
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US16663A
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US1566376A
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GB307444A
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US2161070A
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US2192714A
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US2252009A
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US2313505A
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US2340999A
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US2358363A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-30 | 1951-09-29 | 1952-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-30 | 1955-09-29 | 1956-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-30 | 1959-09-29 | 1960-03-30 | $7700.00 | Window Closed / Lapsed |