Patent US543406A successfully refreshed from Google Patents.
US3428086A
Expired / Lapsed
US
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Throttling valve
Assignee: CLARENCE O GLASGOW
•
Filing: 1966-05-16
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Granted: 1969-02-18
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Expires: 1986-05-16
Abstract
No abstract record available.
Inventors
- 👤 Clarence O Glasgow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:24
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/52; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86734
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2692750A
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US2745628A
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US2917271A
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US2994343A
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US2963038A
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US3212524A
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US3269698A
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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) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |