Patent US2621016A successfully refreshed from Google Patents.
US2621016A
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US
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Valve construction
Assignee: EDWARD VALVES Inc
•
Filing: 1946-04-15
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Granted: 1952-12-09
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Expires: 1966-04-15
Abstract
No abstract record available.
Inventors
- 👤 Macgregor David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:05
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/02; F16K1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US571612A
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US1195429A
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US1825378A
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US2090381A
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US1890357A
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DE611764C
Cited
AT144547B
Cited
US2091669A
Cited
US2225872A
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US2269404A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |