US2642255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packless valve
Assignee: Weatherhead Co
•
Filing: 1947-12-10
•
Granted: 1953-06-16
•
Expires: 1967-12-10
Abstract
No abstract record available.
Inventors
- 👤 George O R Lindgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:13
CPC Classifications
F; F16; F16K; F16K41/00; F16K41/10; F16K41/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1341544A
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US659288A
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US663093A
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US695588A
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US1235816A
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US1477578A
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US1477154A
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US1890505A
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US2061028A
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US2188850A
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US2318961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |