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US3450384A
Expired / Lapsed
US
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Plug valve assembly
Assignee: Rockwell Manufacturing Co
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Filing: 1966-03-16
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Granted: 1969-06-17
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Expires: 1986-03-16
Abstract
No abstract record available.
Inventors
- 👤 John D Watts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:57
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/06; F16K27/062; F16K5/00; F16K5/08; F16K5/14; F16K5/16; F16K5/168
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US268006A
Cited
US2530744A
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US2432225A
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GB718272A
Cited
FR1060216A
Cited
US2891566A
Cited
US2931380A
Cited
US2856150A
Cited
US2994504A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |