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Patent US2610820A successfully refreshed from Google Patents.
US2610820A
Expired / Lapsed
US
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Valve bonnet structure
Assignee: EDWARD VALVES Inc
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Filing: 1946-11-15
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Granted: 1952-09-16
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Expires: 1966-11-15
Abstract
No abstract record available.
Inventors
- 👤 Michael A Markel
- 👤 Mac-Gregor David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:45
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-16 | 1956-03-17 | 1956-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-16 | 1960-03-17 | 1960-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-16 | 1964-03-17 | 1964-09-16 | $7700.00 | Window Closed / Lapsed |