US2778600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gate valve
Assignee: Crane Co
•
Filing: 1952-07-05
•
Granted: 1957-01-22
•
Expires: 1972-07-05
Abstract
No abstract record available.
Inventors
- 👤 Kurt B Bredtschneider
- 👤 Fennema Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:03
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/16; F16K3/18; F16K3/184; F16K3/186
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1023955A
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US1492234A
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DE556652C
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US1803884A
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DE610965C
Cited
US2031372A
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US2150254A
Cited
US2230600A
Cited
US2502689A
Cited
US2504924A
Cited
US2479124A
Cited
US2583512A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-22 | 1960-07-23 | 1961-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-22 | 1964-07-23 | 1965-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-22 | 1968-07-23 | 1969-01-22 | $7700.00 | Window Closed / Lapsed |