Patent US2415881A successfully refreshed from Google Patents.
US3443789A
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Plug valve
Assignee: CUSTOM ENGINEERING AND MANUFACTURING Corp
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Filing: 1966-06-27
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Granted: 1969-05-13
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Expires: 1986-06-27
Abstract
No abstract record available.
Inventors
- 👤 Clarence O Glasgow
- 👤 Charles A Bucklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:49
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/02; F16K27/00; F16K27/08; F16K3/00; F16K3/02; F16K3/12; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6089; Y10T137/6092; Y10T137/6851; Y10T137/7043; Y10T137/7062; Y10T137/7504; Y10T137/7668
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2564168A
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US2797062A
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US2776104A
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US2988321A
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US2973774A
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GB920280A
Cited
US3185179A
Cited
US3240230A
Cited
US3185437A
Cited
US3305210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |