US2796230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve construction
Assignee: Walworth Co
•
Filing: 1951-03-23
•
Granted: 1957-06-18
•
Expires: 1971-03-23
Abstract
No abstract record available.
Inventors
- 👤 Marvin H Grove
- 👤 Austin U Bryant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:04
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/0227; F16K3/0236
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1871965A
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US2109042A
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US2235307A
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US2504924A
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US2603449A
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US2600898A
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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) | 1960-06-17 | 1960-12-17 | 1961-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-17 | 1964-12-17 | 1965-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-17 | 1968-12-17 | 1969-06-18 | $7700.00 | Window Closed / Lapsed |