Patent US3371680A successfully refreshed from Google Patents.
US3371680A
Expired / Lapsed
US
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Double plug valve
Assignee: EIDP Inc
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Filing: 1964-12-15
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Granted: 1968-03-05
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Expires: 1984-12-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Maurice Lee Alcorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:48
CPC Classifications
F; F16; F16K; F16K49/00; F16K11/00; F16K11/10; F16K11/20; F16K11/207; F16K27/00; F16K27/08; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/6031; Y10T137/6058; Y10T137/6416; Y10T137/6579
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1047774A
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US1044259A
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GB191314286A
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US1986206A
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US2019193A
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US1923306A
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US2015024A
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US3194267A
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US3237642A
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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) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |