US2680592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sectional butterfly valve
Assignee: Old Carco LLC
•
Filing: 1949-07-21
•
Granted: 1954-06-08
•
Expires: 1969-07-21
Abstract
No abstract record available.
Inventors
- 👤 Wallace E Zierer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:36
CPC Classifications
F; F02; F02D; F02D9/00; F02D9/08; F02D9/10; F02D9/1005; F02D9/101
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US985431A
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US984718A
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DE362315C
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US1547296A
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US2014000A
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US1706020A
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US1951283A
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US2341694A
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US2344139A
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US2418011A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |