US2788016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball valves
Assignee: Rockwell Manufacturing Co
•
Filing: 1951-05-11
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Granted: 1957-04-09
•
Expires: 1971-05-11
Abstract
No abstract record available.
Inventors
- 👤 George F Scherer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:36
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/22; F16K5/227; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4358; Y10T137/4393; Y10T137/4421
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US117704A
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US548518A
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US982815A
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FR464744A
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US1616386A
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US1770900A
Cited
US1906266A
Cited
GB446187A
Cited
US2175867A
Cited
US2333424A
Cited
US2433638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-08 | 1960-10-08 | 1961-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-08 | 1964-10-08 | 1965-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-08 | 1968-10-08 | 1969-04-09 | $7700.00 | Window Closed / Lapsed |